I don't play basketball or anything, but have you put any thought into what position you'd play? Can you consistently make deep baskets, are you a skilled ball hander, do you have a good vertical jump, are you physically stronger than average? Are you short, tall or average height? How quick are you?
Are you joining a summer league or are you just playing pickup games?
Enough questions. I'm just an armchair shooting guard.
I guess I'd have to say just try to play to your strengths. Find out what role you best fit in on the court and pay attention to where your teammates are on the court.