Tips for highschool?

Im going into my freshmen year in like a week and i want to actually have a chance at enjoying my 4 years. Im a total introvert and i get like.. choked up when actually talking to people in person if that makes sense? I was weird in 6th grade so for like the entirety of middle school i was kinda an outcast so i actually want to try to have people like me. My whole look has changed over the summer so now im just wondering if anyone has any tips?