I am an 11 year old girl who is just about to start year 7. I am going to a new school. I know a few people there already but how do I make more friends?

Hey,smile and be friendly,join clubs or groups that interest you,example drama clubs etc.

It won't be long before you get to know your class mates,and look around,see if someone else is looking a bit lost,just approach them,smile and take it from there.
Be yourself.