Is 16 too late to dance?

I want to become a professional modern dancer. I will be taking ballet lessons soon because a friend told me ballet was a good foundation for any style of dance. I am 5'6" and currently weigh about 175 lbs. I stretch so I am pretty flexible but not as much as I would like to be. I know that getting physically fit is a huge part of it but I would like to know other ways that I could prepare my body if it's not too late. I was a dancer in middle school but after I finished I basically fell apart. Please, any advice or tips you might have will mean a lot.