Don’t worry about it, you’ll meet people in class.

Classmates who you have multiple classes with will probably be more likely to be your friend. I know this because I’ve moved plenty of times. I just started to talk to people, say “Hi, I’m xxxx”, you don’t have to say “I’m new here.” Just kind of pretend you’ve been attending the school for a while. Go and participate in sports and clubs that you would normally do in your old school. Find activities that will help you meet people.

Just start slow and eventually you can make friends

It’s not too late.

Be a joiner when you get to your new school. Join something academic, something artistic, something sporty, something civic-minded/charitable.

And if it’s any consolation, you’ll make a whole new set of friends when you go to college, when you get a full-time job, whenever you start something big in your life. (So, if it doesn’t work out so well at one place, there’s always the next thing coming up in your life to present you with new people and new opportunities!)