First of all, greetings. I've been looking for the right sub to post these questions and this is the one that seems likely to be the most appropiate so far. If I am breaking the rules or you believe that I should post this elsewhere, then I beg your pardon and sincerely ask you to suggest me a good sub to put this query on.
I am starting to do a deep research for a personal project I'm working on and I really need accurate and specific info on these two topics.
Regarding to the War of 1812:
Regarding to 1840-1860's Victorian London:
As you can see, I have many questions, but I don't know where to find appropiate answers for them, so I thought that I could start in here. If you people could you suggest me any books, maps, even movies, something that can help me with that, I'd be very, very grateful.
I'll be waiting for your answers. Muchas gracias! God bless.
My answers will be, perforce, short and lacking in the detail. I'll only be attacking the Victorian questions, and even then leaving many unstated. There's only so much one can do on a short Reddit post on a lunch break.
I strongly recommend you buy the book What Jane Austen Ate and Charles Dickens Knew, by Daniel Pool. Though it's popular history and prefers the epigrammatic to the detailed, it will quickly and easily fill you in on all the general aspects of Victorian life from the middle class upwards, as well as the currency and the districts of London. It's a valuable handbook and should answer most of your questions in a single read-through. If that leaves you further questions on those topics, please read Judith Flander's books.
If you'd like to see how the middle-class lived, from their own pens, I cannot more highly recommend the first few chapters of The Autobiography of G.K. Chesterton.
For the living conditions of slums, please read Henry Mayhew's London Labour and London Poor, as well as Philip Sugden's utterly invaluable Complete History of Jack the Ripper, which focuses on London and it's citizenry as much as the Ripper and his crimes.
Social classes, though important, were much more relative than in previous periods; your precise position tended to change depending on the social class of the personal judging you. From the status of a Lord you may appear to be low class, from the perspective of a guttersnipe you may appear to be just short of the House of Lords. (You see this occur in the Sherlock Holmes stories, for instance, and if my memory does not deceive me in Dickens as well).
I hope this helps you!