There is a girls golf team at my school...?

Like anything in life, practice, practice and once you've done that, practice some more. Take some lessons to get a solid foundation going and just keep practicing and expand on your lessons. There are no real tricks to becoming a good golfer, just hard work and determination. Get going, try out for the team, and see what happens, think, free golf if you make the team, which was the only reason I played in high school!