Congrats on completion of the rough draft, Fran! I'm wondering, have you been able to try it out on your daughter, or better yet, any of her friends for a test response? (Family might not be the best test subject!)
I echo what Callalily says...even though it feels done, you're just at the beginning. (But a great beginning.) It'd be extremely beneficial to share a few selections or chapters with a local writers' critique group (or even on our password-protected youth writing forum on AW) for some constructive feedback concerning pacing, plot structure, dialogue, etc. Then after honing and rewriting/editing as much as you can, get hold of Writers' Market 2011 or a current agent market book at your local bookstore to find the best-matched agents/publishers for your work. Nowadays commercial book publishing is most easily accomplished through an agent; and we have some threads on AW also dedicated to which agents/publishers might be good to avoid, too. Don't miss those.