I've met folks that had their first fight when they were about 40-45 and their grit is insane! They keep saying to me things like, I've got so much to catch up on you younger kids (I'm 26 lol), etc. But to be perfectly honest and as cheesy as its sounds, age is just a number. Once you've put your heart, your mind and your soul into achieving that goal, it's never too late.
Can't wait to see your progress! Best of luck to everything!