AP Biology class help

Please help!!! I’m going to be taking AP Bio and AP Chem online in September. The problem is is that the AP Bio class doesn’t 100% prepare you for the AP test from what I’ve heard. I seriously do not know what to expect because all of my friends say that they have taken this class and have gotten 5’s, but haven’t said a word about the workload and/or what the teacher covered in the class or how to pass it. Please someone tell me what the topics are and how are they covered (like how does the teacher expect you to understand it). Anything will be appreciated.