How hard is Apush?? Do you have to know everything very deeply?
Honestly, it all depends on what type of student you are. Then again, anybody can succeed in the course - it’s not as though you have to know every single fact, especially since the AP Exam changed last year and now the multiple choice is mostly about inferring. I would recommend that you read AMSCO and take some online practice tests (if released by the Collegeboard).
On a relative scale, though, it’s much easier than AP World History - and a lot less memorization too! Think about the class as though it’s a story of American history; if you’re interested in it, it’ll be a lot easier.
(I took APUSH last year, got an A both semesters, 5 on the exam, and an 800 on the subject test.)