Out of the ones you've got there, One Song Glory is probably the best choice. Also, if you have the opportunity at all, check out Tick Tick Boom, w/music also by Jonathon Larson. Some of the songs there go pretty high. And Labashier is right, singing music from the show you're auditioning for is normally considered a bad idea. I mean, I've seen guys get away with it before (for Pippin, this one guy sang "Corner of the Sky" and got the lead), but it's risky, and you have to be very, very, very good to pull it off. And its pretty much a slap in the face to some people auditioning (or, at least I've seen people take it that way).
Basic rule of thumb: audition with songs either by the same composer, or that sound very similar in style (which is why Larson shows are a good bet in this situation). And don't worry too much if you don't nab your part freshman year. I was in the chorus sophomore year, and landing leads by senior, so it just takes time. If you're good enough, you'll get them at some point.
Oh, and Labashier's right again, there's a student board for this, but you're 14 so we'll let it slide