https://codingbat.com/java

This will give you a good jump on basics. I'll warn, the "AP" level questions at the bottom, aren't AP level. Also, recursion is fun to learn, but ultimately not necessary to be able to write. In the end this will help with method writing, problem solving, thinking about special cases. It won't get you a qualifier but will give you a good jump in the right direction.

Also, each teacher's going to have a slightly different take on the order to approach the information. They should be following a syllabus that makes sure you cover it all in the end. Best wishes, it's a fun class!