what's the best way to somewhat self study bio?

Hi,
I am going to be taking AP biology next year, and apparently, in my school, everyone says the teacher doesn’t teach and his tests are really hard, so this summer, I’m trying to self study a bit of AP biology stuff so I can get a head start. Does anyone know any good online courses or workbooks that can help? Thanks.

Crash Course on Youtube is really helpful. Also, if you buy the AP Bio book in advance and look over it a bit, that could help. Good luck!