Freshman? Just starting high school and im nervous af..

I mean, I trust everyone saying that high school is better than middle school. The problem is most of my longtime childhood friends are going to a different highschool! (And those I do not I probabpy wont have classes with). Im really super shy and worried about all the tall people too, im only 4' 8! 😭😱 any advice or tips maybe? Thanks u guys 💖