Is 6 AP Classes too much?

It is fine to plan ahead as long as your flexible - your grades, interests etc may change over time.

I agree unless your school requires 3 years of US History don’t take a 3rd year just so you can take APUSH. (At our school it is US History II or APUSH) Some colleges specifically say they look for US and World History so I woud not take AP Psych in place of a world history class (any level) if you don’t have a world history.

French your fine if you stop at French 4 - colleges use levels for foreign language vs number of years. It is fine if you never do the last year just to take AP - remember there is no contest to get the most APs. You might find a fun elective class to take - say biochemistry that doesn’t come in AP but that is okay too.