You're not too old. Perhaps you need to keep your expectations realistic. You might not find yourself at the top of results - except in an age category, maybe.
That doesn't have to stop you from enjoying a Match or visit to a range. I don't practice anything like some people here, so goal one at a Match is not getting a DQ, and goal two is doing the best I can, not worrying much about what everybody else is doing. It has happened that I surprise myself by beating some people by just hitting the targets, instead of trying to go fast.