You'll be fine. Everyone finds there place in high school. Everyone. Doesn't matter if your weird or awkward or anything, mad people are gunna go up to you and ask like where your from and if you play sports and a whole bunch of shit. New people are really exciting because generally in most high schools its the same people you see every year so someone new is cool.
Just be chill and crack jokes. Talk about sports and be like "this class is gunna suck" "this teacher is a bitch", etc. Talk about the stuff you have in common with people and ask questions, "are there any hot girls in this school?" "Are there any parties in this town?" "you play any sports" "is our football team any good" "do people go to the games" etc.
Go up to some hot girls in between periods and ask them where something is. "Excuse me, do you know where the cafetaria is I have lunch 6th period and I have no clue how to get there." If they're not bitches they will explain it to you and then just act confused again and make sure you say something like "oh yea I'm new to this school my name is Jason" Shake their hand. They will say "my name is ashley" "nice to meet you" her friends, not wanting to be left out will also be excited to meet you and shake each of their hands and try to remember their names.
Always shake peoples hands when you interact with them, say I'm new here my name is ___, its nice to meet you. Always say goodbye. "Hey thanks for the help, I gotta go now I'll see you later" Next time you see a person you met, say hi, adress them by name (if you remember), ask them whatsup.
A good thing to do is to bring up past interactions with people. Like I was talking to this kid John and he said this teachers a bitch. Or do you know if this girl ashley has a boyfriend shes fucking hot. By doing this people will assume your sociable, knowledgeable, and cool enough to be talking to a hot girl. Even if you said dumb shit to ashley and stuttered and she thought you were a loser, in the eyes of another person that conversation will make you look cool.
By the time you meet a lot of people, people will talk about you and more and more people will want to meet you, befriend you, including girls. Jea I'm bored, good luck/have fun wear a condrum.