Nervous about school? Freshman...?

Hi, I'm going into a public high school as a Freshman this year, and I am honestly really nervous! It's my first time in public school, and it's the biggest school I have ever been in...ever! I think my personality is fine, I'm usually pretty social...for sure, but I dunno...I am also worried abut getting cl to cl, because in my old schools, you just had cles, you didn't have to get to them... I don't really know if I'm more nervous socially or academically...help? any tips?