How should I self study AP Calculus BC's extra topics while I am only taking APCalculus AB?
I have already registered for the BC exam while I am only taking AB this year and I've been planning on doing so for months (since, in college, what I plan to major in is very math intensive and I want a head start (astrophysics)), but as I've been searching I haven't found any guide on how I should execute studying. I'm aware units 9 and 10 build off of concepts from AB that I'd struggle without, but I want to give myself lots of time to self study BC to get a 5 (preferably, start November-Early December, I predict my class will be at unit 4's beginning) and I don't know when after my class finishes what I should start studying topics from BC. At the moment, my class is currently on Unit 2.2. Should I wait until we start Unit 3 to begin studying basic integration and u-sub for unit 9? Are there any extra topics I should study beforehand? Help is appreciated!
(As for the extra topics scattered throughout Units 6-8, I will simply study them after we go over the preceding lessons in class.)