find one kid your first day that doesn't have any friends either and introduce yourself and ask if you can sit with them at lunch and really have a conversation with them plus it doesn't hurt if you ask them some questions about themselves to really get to know them better-hoped that helped i know what it feels like to start school and not have any friends in your grade either, you just have to standout and introduce yourself to a lot of people then the next day you might have more friends to get to know better
I think you should be your self. If you are humorous say a joke. If you are shy you can chill back and speak to your classmates. A greeting will work best for your situation. atleast people will notice you are there.
Choose your friends wisely. Personally, I would first just watch how everyone acts. Don't get to school and start asking to be everyone's friend. I think you know what I mean. Be yourself and be kind and the right friends will come your way. :D
I was just in your shoes on Monday. Be yourself and don't try to hide. When you choose your seat, find someone that you might want to get to know better. At lunch find a group of girls that look like they're having fun. That's what I did and I have a couple of lunch buddies:)