I totally understand how you feel , I was in ur position last year but I survived and passed the class and the ap exam so trust me you will to , they wouldn't have let u in if u weren't talented

I'm guessing ur quizzes are on the book , you should take reading notes or annotate your book , it really helps the information stick

as for labs google them , I know it sounds like cheating but reading over other people's labs will help you understand what's happening and forming lab groups to complete the lab write ups help soooo much and I made very good friends

I would recommend the Kaplan ap biology work book for the class and the test

and the sparknotes complete package for the test

the flash cards did wonders for me lol