Back to public school

I’m currently a junior in high school but I’m homeschooled and I’m going back to public such this upcoming year (senior year) and I’ve been in homeschool since I was in 3ed grade so I’m not sure what to expect can anyone give me advice I do know a little bit about public school like a lot of the kids and teachers are mean but I also feel I won’t be happy with it I don’t think I would make any friends everyone seems so fake and all people ever talk about is who liked who’s Instagram photo or things like that does anyone have any tips on how I can make this suck less lol because I haven’t a clue.