I am taking ballet, voice, and jazz classes in addition to teaching dance. My goal is to become a successful singer because I LOVE to sing. I sing my heart out. Response to Ref 293. Sounds like you're doing the right things right now.
Strong actors tend to work more than non-actors.
I suggest that you worry about getting work first, for now, and let the union thing go for a while until you've got yourself some credits. Response to Ref 294. There are roles and spots for people of every age, and a degree of maturity can also be a comfort to casting people who worry about the traditional flakiness of actors and dancers. Don't even think about it, except when you see a casting notice calling for an age range way outside of your own. By the way, Equity does not permit casting people to ask about the age of an adult actor.