This is a long post, and I greatly appreciate everyone who reads even some of it and every bit of feedback I get. I've been reading through the tagged posts about going into the history field as well, and those have been supremely helpful.
[TL/DR, I'm trans, I don't pass, I have an invisible disability, and I'm an older transfer student who needs to pick languages and an area of focus, like, now]
Some background on my personal situation:
Some background on my academic situation:
What I need to figure out:
[TL/DR, I'm trans, I don't pass, I have an invisible disability, and I'm an older transfer student who needs to pick languages and an area of focus, like, now]
The sum of it:
I need to pick an area of focus and languages to take, and I need to do it soon.
Thanks everybody <3
Without knowing you, my gut instinct is to say that you should just focus on your BA and your personal health; deal with all the grad school questions in a year or two once you've done a great job on the BA. Moving to a new school or a new program will take some adjustment. You need to do a good job in your classes and write good papers, all while dealing with your health issues. You will need to get good letters of recommendation, which means you will need to get to know your professors, but in the process, perhaps they will also be able to offer much more personalized advice than you'll get from random people on the internet. None of this will be easy, so put the bulk of your energy there.
I see why you're asking about graduate school research, even though it is very very very far off. You want to do research somewhere where you will be able to be successful and safe, which means starting off on a trajectory that can take you there. Keep in mind that one's interests change frequently as your path through grad school meanders along. When deciding what language to learn as an undergraduate, perhaps aim in the very general direction of your interests. I cannot tell from your post where your interests lie, but you'll want to decide on a geographic area and temporal interests (your general thematic interests sound like hot topics at the moment, so that's good). Geographic and temporal interests point you towards languages that might be useful to you. Perhaps it is too obvious to say that if you want to learn about Chicano farm workers, then you probably shouldn't learn Mandarin haha. If you want to learn about Polynesian seafarers, then don't learn Quechua.
Then again, let's be realistic. The chance that you actually do make through your BA, then into a top-level PhD program where you do groundbreaking work, and then become a professor is very very very small. That's just the reality for everyone, not just you. THe chances are really really small. Most people split off eventually and end up doing something else. That's fine! The odds are stacked heavily against everyone, and the humanities are contracting at an alarming rate. So maybe picking a language that will be useful and interesting for you IF you end up outside of academia is more important than nailing a research language in the long run. Again, I think you should aim for your general interests and go from there. Why not like what you're doing while the ship is sinking?
You have a particularly unique set of personal circumstances to balance, but you are still in the "exploratory" phase of your career. Based on what you wrote, it does not seem like you are at the stage yet where you need to stress too much about grad school research beyond general interests. Read widely and take a variety of classes if you can. Write a few different papers that focus on totally different things. Take a few theory classes. Explore the thematic intersections you alluded to in your post. All of this will point you towards useful interests and approaches. To get through graduate school, you need to be interested in your topic. Your research will be a part of your life for ten years or more if everything goes well. I cannot imagine working on a project for that long without liking it. Please don't pick a research topic solely on where you can research. That might lead you to research something that is crushingly dull for everyone. There has to be a spark of passion somewhere and you want to have a topic that makes a contribution to interests that the field has.
You can get around the challenges you outlined. Many graduate students and professors have travel limitations. Some for political reasons, LGBTQ+ reasons, health reasons, family reasons, etc. They still complete their research, if they strategize. Fortunately, we are entering into a period where more and more primary sources are digitized. Many print sources in Europe and the U.S. are already widely accessible. Many archival collections are partially or completely online. Additionally, some research libraries hold copies of other archival collections in other inaccessible countries. You're not completely limited, but you'll have to strategize to get around your personal needs and limitations (everyone does).
Last thought is that the history of the academy made it so that structurally, the academy at its core is not made for anyone who is not a healthy white cis male. Everyone else plays on a higher difficulty level. It is better than it used to be, but all sorts of bias and systematic problems still subtly underlie the academy that you will need to overcome (see the controversies in classics and medieval studies for evidence of the continued existence of systemic problems). You will move through spaces that a century ago were meant for you. Now that does not mean that you are not allowed to be there now, that you should not pursue your interests, or that you will find everyone hostile. Quite the opposite, you'll be in the spaces that developed the theories that underlie the very questions you've asked here. I think most people in academia agree that diversity is good for the field, and there are lots of people from all walks of life pursuing advanced degrees. You will build a support network, but building a career will be extra taxing for you because well-meaning people accidentally harm diverse students frequently (often because they don't know or realize they are doing it), and the structures of the system still don't work well for everyone. This is tiresome for many. TBH I think your personal health will be by far your biggest challenge; I think academia is only now starting to realize that physical and mental health are major, unaddressed problems. A century of activism in the academy has made it more aware of LGBTQ+ issues; but personal health? I dont think so. That ship is still sailing in the complete wrong direction if you ask me.
So make sure you advance with your eyes open to the challenges ahead and make sure you go to graduate school for the right reasons (deep, passionate interest in research and future career goals). Be aware (as it seems you already are) that going to grad school is probably a bad idea (for everyone, not just you). Perhaps take a year off before considering grad school to save up money and try other career opportunities. If you do go to grad school, understand that you probably won't end up where you think you're going (and that is ok). There is still value in advanced history degrees. If not, that's ok too. There are many other great careers out there.
I don't personally have a ton to say but. As with your situation, I am trans, invisible disability, and a history major. I found that going to a reputable online school (Southern New Hampshire University in my case) with a great set of academic advisors and mental health counselors will go a long way to helping you. Being all online means I have to set my own schedule and keep it up, but I don't have to do it alone and all the resources I could ever need, from librarians to advice, are accessible at a touch. I can also go anywhere in the world and as long as I have a reliable Internet connection and a computer running or simulating Windows, I can do my school stuff. As for what you might not want to study, it's a tough question. Mostly because there's so much you can study without gender roles being the focus! I'm personally working towards a big project on ancient Persian culture and Mediterranean trade, and while you could look into the gender/sexuality side of things (there's a whole subset of history dedicated to researching and understanding those roles), it isn't so over prevailing that you must. I can say that looking into Arabic culture has bought up a lot of questions in the treatment and expectations of men and women, without many nb folks to speak of, so perhaps the areas you're looking to avoid would be cultures that focus so heavily on the differences.
As for the language question, I also don't have much input there. I have a Hawai'ian trans bud and their native culture has concessions for trans folks, so perhaps going with cultures that include "third gender" pronouns (I believe that's the official term) may be what you're looking for. Best of luck to you!