Age shouldn’t be a factor, and I think Nick gave you the right advice. It’s all about relaxed, controlled, methodical, and goal-oriented practice. No matter what hurdle you are trying to get over, the worst things you can do are to tense up and try to go too fast too soon. However, if you really feel that you can’t overcome this problem on your own, take a lesson or two with a local drum teacher and have him or her really evaluate the technique you use while playing rolls. It will be well worth a few bucks it will cost.
You just started down a long road of discovery. Enjoy the ride!