Starting Baseball Tips?

Recently, in the past month or so, I have resolved to tryout for the baseball team next year. The only problem is that I have never played before... I'm 15, going to be a sopre in High school next year. I just want to make it short and sweet. I want to be a pitcher preferably. My friends always told me to play baseball because I have a great throwing arm, but I know I need to refine it to be even considered on the team. Tryouts are next year, what should I do to prepare? What exercises and drills should I do, etc. Thanks in advance.