I've done archery for about six weeks, and rock climbing, tree climbing - and combat, running and vaulting. But also yoga and things like that, to stay catlike!
But clearly the fact that we've gone from zero Iraqi security forces on duty in May to up to 200,000 today is an enormous accomplishment, but it's not enough.
Research your idea. See if there's a demand. A lot of people have great ideas, but they don't know if there's a need for it. You also have to research your competition.