How else should I prepare for this class?

I’m taking summer classes just to get my associates faster. One of my classes is going to be taught by a professor everyone seems to complain about.

He’s the only professor for that course (that I know of) and it’s mandatory for me to take it. People say he puts things on the test he explicitly says is not going to be on there, he grades harshly, almost got into an altercation with a student, barely teaches, talks down to you if you ask a question, and only jumps into caring teacher mode when the Dean of the division walks in. once he walks out, he goes back to not caring. ...😐. Some students even tried to file a petition against him one year.

A friend told me that in order to pass you have to really be “on it because he gives a lot of ppl failing grades.

So I’ve been preparing for the class by studying up on the subject by using YouTube professor videos and app flashcards on the subject. Just to have at least basic knowledge of it. Once I’m able to buy the book for the course I’ll be reading it as well. What else can I do?