I played lax in high school and you are bigger than I was. But I was small and quick which meant I was a harder target to hit. Did you get a defense men's stick or an attack/mid?

Really during the winter and as you're getting into the game find a friend to play catch with and work on cradling and pick ups. At your age those skills will help you a lot! Also if you're the quick type that'll help you get center mid which was my favorite position.
Oh and remember goal tending in lax is a whole lot of luck!

Rugby is a great sport as well. I got to play that for awhile also. But it's up to you.