Self studying AP chemistry with Zumdahl

Hello, I am self-studying AP chemistry with Zumdahl. I am currently just doing questions at the end of the textbook that says "Exercises" with the questions divided by the sections. I was wondering if that would be enough questions to get a 5 on the AP exam or if I need more practice. If I need more practice, where should I obtain those exercises? Also, should I get the student solution guide or is that not effective? I am self studying so I was wondering what I should do about the labs. How are other self-studying students making up for these labs? Last, what chapters of the Zumdahl textbook does the new AP biology curriculum require? Thanks!