What should I do for my birthday coming in May?

Hey (Fluthers), so my 16th birthday is coming up and I don’t know what I should do. I’ve never held a birthday party in my teens years. I have friends from 9th grade = Agnes, Agla, Helga, Anastasia, in my class 10th I have linda my close friend, the girls in my class I never really talk to them alot…. Then in college I have a friend named Anna. I just dont know what to do, because anna and all the others don’t know each other, but she is my bestfriend.
Then I also have friends the sama as anna, they live 1–2 hours away from where I live. I don’t know what to do:S

Should I just have a sleepover with Anna or have like maybe everyone bring food? I’m confused….