There is no age, height, or weight requirement to skate. It is good exercise no matter what your age is. If you want to be competitive, most start young. But, I practice with many adult competitors.
But I really believe it is in America's interest as well as that of the free world more generally to stop Iran from getting its hands on nuclear weapons. This regime has threatened to wipe Israel off the map and bring about a world without America, and either of those is a really bad prospect.