I would recommend pushing it off until June so that you will have adequate time to study. I used a Princeton Review book and also took a Princeton Review Course… the course was basically the same exact thing so if you are disciplined enough about the work and teaching it to yourself then I would suggest just buying the book and saving hundreds on the class. They also have a great word list in the back of the book that comes with cardboard flashcards too so you can carry them around and practice easily.
Also buy a College Board book of previous tests to get more used to the real tests closer to the actual exam.
It’s more learning for the test itself than learning a specific topic/skill, so the more you get used to how they ask questions and the kinds of tricks they pull the better off you’ll be.
Hatzlocho!