Wait until you get out to practice.. I take it that this is a college side team ( not a club side). Getting bigger may not be that important at this point. I live in St. Louis and we've got several club side teams and a newly formed super league team. The guys are bigger, but they're older too.
You're tall and you would probably be an ideal height for a 2nd row or lock. See how the practices go and then base your decision on your position.