Hi there! You are bound to be scared the first few days that you go to a new school. That is just normal. Your situation is nothing out of the ordinary.
You can always talk to people. Ask them questions about the school. You can always make new friends by being talkative. Everyone loves someone to talk to. Just give it some time.
Maybe instead of making new friends, you should be focusing on your schoolwork more. Schoolwork is more important than making friends, but they are just nice to have. Try talking to your teachers. They can always help you with your homework, and they are nice people to talk to.
Are you still in contact with your old friends? Maybe you could call them up and converse with them. Your old friends know you better than anyone at this school knows you. You can seek comfort in them.
Just take it day by day. You can't just not talk to anybody and make friends. You need to put yourself out there and be noticed! You aren't going to do that by being a wallflower. Just try to talk to some new people and try to be more outgoing.
I know that going to a new school can be tough sometimes, but I know that you can do it! Just try talking to some new people, and hopefully make a few friends! If you want to talk to me, you can always PM me. I would be glad to talk to you. Take care and good luck!!
-Chris-