AP Physics C Advice

My school only offers AP Physics 1 & 2 and AP Physics C is much more useful to have done. i am enrolled in AP Physics 1 as of now, and my plan is to take that class, but study calculus asked physics as well, so I can take the Ap Physics C exam. I’d like to ask for advice, as I have a couple different ways to learn calculus-based physics in mind. I have a textbook, the fourth edition Serway’s Physics for Scientists and Engineers, which is approved by the college board as matching the content in AP Physics C courses. There is also a free course on edx.com, Mechanics Review, that covers the topics of AP Physics C. The link is here, if it helps: https://www.edx.org/course/mechanics-review-mitx-8-mrevx#!

I’d like to ask whether it would be better to use the textbook or the class, or both. I generally learn easily just from textbooks, and using it would be easier, I suspect, so I lean towards that method, but I’d still appreciate advice.