i am starting to study usmle step 2 ck
i have kaplan books and videos and master the boards
how should i start , which is more important and how much time should it takes ?
my exam will be in 7 months
thanks in advance

My advice- do questions. As many as you possibly can. Books are somewhat overrated in my opinion since the exam tests not only your knowledge of the material but also your ability to apply it (in the context of exam questions). If you can't apply your knowledge on the exam (i.e., answer questions correctly), then it doesn't matter how much knowledge you actually have, since it won't necessarily be reflected on your exam score.