Odds of Getting In
Almost all choreographers first make it as a dancer, which is about as likely as making it alive out of a minefield. If they do manage it, they then have to leap a whole set of new obstacles when they rev up their choreographer career.
If you're determined to do this, here are some tips.
One way to ease your way into choreographing is to be a dance captain. This means that you're the dancer within the ensemble who's job it is to keep the dance clean and well-executed while the head choreographer is off doing cooler stuff. So basically, you have no creative control, but you do get a chance to boss around your peers.
Many young choreographers also get their feet wet by assisting an established choreographer. Depending on whom you assist, you might actually even get a little bit of creative input, or you might get a lot of practice fetching Jamba Juice.
One thing that is essential for new choreographers these days is to have a killer reel up on YouTube. There's a good possibility that you'll do your first gigs as a choreographer for free, but you can make them pay by posting vids online. If your stuff is hot and you get a following, it can press fast forward on your career.
Of course, if your stuff is ridiculous, you could become a national laughingstock—so there's that.