I know what you are going through, since I felt the same for a couple of years. I found that smiling works the best, just smiling. If you can get yourself to smile while walking through the school, people will start talking to you, just because of that. They won't ask, why are you smiling, but they will talk to you because you look friendly. Plus, smiling will also make you happy :).
And since you have moved, it is obvious that most people have friends already. If you are able to, just sit down at a table with a few girl/guys that seem nice. Because they will be there, you just need to find them. And that is something you sometimes have to do yourself.
Since I just started university this month, I am also in some similar situation. I moved out of the house and know no one except my room-mate. And there are a lot of students at what I do, so it is hard to connect at the beginning. I decided for myself that I will just talk to everyone that seems nice, say "hi", etc. And people respond very positive to that. When I was depressed, I really thought they would find you stupid, but people like others that look positive.
I hope you will do a bit better, and maybe talk to someone this week! And of course feel free to say/ask whatever you want.
All the best!
Acceptance is the key
Existential depression and Insecurity
Try to keep smiling! :)