I've forgotten what the minimum age is for a falconry license ---maybe fourteen?. I do believe it is a state permit. In California an apprentice falconer must be sponsored by a master falconer (licensed two years). He is then permitted, for the first two years, to keep an American Kestrel, Red-tail hawk or (I believe) a Cooper hawk. Maybe it varies by state.
The wonderful thing about keeping a raptor is you can take them places and fly them, something you can't do with parrotiforms. And they're really not much harder to maintain than a cockatiel, as long as you can build an outdoor muse. They're certainly a lot quieter.
I haven't flown hawks in nearly 40-years, but I still miss it. A well-manned Kestrel is a joy to fly and to just be around. Did you know they smell good?