I am 30 yr old male. Want to learn martial arts. I am lean, 5'9", not muscular, but I show good stamina in aerobic exercises or sports like badminton. Based on this information, can anybody advise me which martial art should I learn first?

While going through some material on different martial arts, I understood that Tai Chi is an excellent martial art. But I also read that the evolution of a martial artist is from the external to the internal. Does that mean Tai Chi is not a beginner's martial art? Should we learn it only after we master an external art like Kung Fu first?

Thanks you.