I've heard arguments for every side, but im looking for sources mainly. id appreciate book and paper suggestions too, bc i know its a really big topic of debate. I really am just looking to learn the impact of okinawa (knowing it was a really brutal battle, and top army brass though it'd be a harder landing than D-Day) on the choice to forego an invasion of Japan. any help is appreciated!
I think you may be misunderstanding the use of the atomic bombs as part of the strategic bombing campaign against Japan. There was not a decision to "forego an invasion of Japan;" the atomic bombings and an invasion of the Home Islands were a both/and, not an either/or (there was some discussion of using more bombs tactically, on invasion beaches for example). These older answers about the bombings may be of some interest to you:
https://www.reddit.com/r/AskHistorians/comments/c34bcf/did_the_atomic_bombings_in_japan_indirectly/
or our general FAQ section on the bombings: