Hi Musicluvr49. I can only give you my experience but here goes. The Haydn in D is nice , and of course there are a ton of Mozart Concerto's . I think #9, #17, #20, #21, #23 and #26 might all be in your range. Of course never having seen you play im only guessing, but if its your first shot at one These are a good place to start. If I was pushed to pick one, it would be Mozart piano concerto #21. Thats my favorite.
Question are you planning to play it with a second piano, or do you have a shot of playing with a school orchestra?
Cheers, Becky