How do I talk to this girl at school.?

Well, there's a really beautiful girl I know that will be a senior next year. I'm a year younger and I'm pretty sure I could get her If I knew what to do cause I'm confident and I have pretty good looks (according to other people). I'll be the starting runningback of my football team next year and I rap. How can I talk to this girl that I don't really know. And Idt she knows me. I wont have any classes with her either. So what should I do? Lol