>>8
most "freshman calculus" books are more or less interchangeable. To move into more advanced topics, one classic is Rudin's Principles of Mathematical Analysis, and I'll second the Axler recommendation, but what would probably benefit you the most is to pick up random Springer UTMs (undergraduate texts on mathematics) from the university library on stuff that looks interesting to exercise your math reading muscles. One great book on mathematical topics and physics, which starts at a low level and quickly (!!) jumps into advanced topics is V.I. Arnol'd's Mathematical Methods of Classical Mechanics.
In physics, supposing you know the freshman stuff, the E+M and quantum books by Griffiths are a great start to more advanced topics. I think by the time you are comfortable with those you'll know enough to figure out where to look.
Learning any of this stuff will take years of concentrated work, even if you are a genius, (though, chances are you aren't a genius since you're asking for advice on 4chan) so don't get discouraged. It does get easier as you go along, though it may not seem that way for a long time. It really helps to have people around to talk to about stuff too.