As i think someone before me said it probably too late to become a world champion, but if you just want to fight and get fit it's never too late. I started about 3 months ago and I'm 30 and I love every minute of it. There's no reason not to and its better to start now than never to start at all.
Y ask any 1 ELSE UR 30 BRO. Who cares what anyone else says about ur chances on being what & who you wanna be! Look u must show no mercy nor have any belief in how others JUDGE U! For ur greatness will silence them all! (Warrior)