Try to try them out at your local range. When I was your age they would let me rent guns and shoot at our local indoor range, but times are not the same now. You will need a parent along to even legally handle them.
Take along a parent and go somewhere where you can try them all, and see what fits your hand best. Every hand fits different guns differently. No matter how cool one gun may be, if it doesn't fit you it is not right for you. At the very least go to a store with a big selection, but the better choice is a range with rental guns.
Try some and let us know what you like. Then we will offer some suggestions.
"Obama has ordered the launching of more Tomahawk cruise missiles than All the other Nobel Peace Prize winners combined."