Yeah it's never to late to start.. Some people go pro in their late 20's early 30's... It all depends on determination and commitment & being blessed with good genetics & natural tallent doesn't hurt... But as they say, it's not always the destination that's imortant, it's the journey to get their...
You may not get to the point of having a successful pro career, but the rewards in your pursuit of that goal will be well worth every minute of effort you put in from here on in.. And unquestionably 4-6 years of hard commited work can take you a LONG way, and there's no one that can say you don't have it in you...
Success always means breaking through barriers & bounderies as they came. This is true for ANYTHING in life. Your success over others comes down to the barriers that you pushed through and others failed.

** It seems your age is your first barrier... it's your choice whether to crash your way through that barrier making you stronger, or let it hold you out of the race..