HELP

so i am going to public school next year (I've been going to private school most of my life btw it was not my decision I was just stuck with it) and I have no clue what to expect or anything like that so if any of you guys have any tips pls share!! if it helps any i am repeating my sophomore year so i know all about hw stuff and what not to do with classwork but anything beyond that i don't know
pls help ;-;