Sex Ed..

So I’m young and I want to know everything I need to know about sex not because I want to have sex but because I don’t know if my school will cover everything or if they are even going to talk about it(I will be starting high school) and I dnt want to ask my mom we had a talk already but I’m not trying to go into details with her😂 so anything I should know?? Or anything I should be warned about??