Odds of Getting In
While yoga can be done basically anywhere there's enough space for you to stretch deeply, making a living off of it takes a little more effort. Doing so is mostly a matter of putting in the hours and putting down the dollars. Getting certified will certainly help you build your case, but when you're first starting out without any actual teaching hours under your belt, your yogi cred is a hard sell to private clients and yoga studios.
You may end up subbing in a training facility or studio for a yogi who's out battling illness or injury. Use this time to make friends, because when the other heals, you don't actually want them to get fired, but you really don't want them to get rid of you either.