Here is what I think RS...

Go for it. This is what you have always wanted to do. Only good can come of it. Even if you dance for a decade (?) the lessons you have learned in going back to it and the experience you have gained will be with you and you will then have them to take on to something else like teaching. If you decide to teach after dancing professionally you will be able to encourage (slightly) older dancers like yourself (lol, that's funny b/c you are NOT old). Just take good care of yourself and your body. Don't forget to rest and eat plenty of healthy foods.