Regardless of if you need to or not you need to learn to do it, so you can do so in the future. If you do, however, have hair on your face, then yes you are old enough to shave. If you don't, you'll look like a fool because the hairs will grow unevenly on your face.
e: If you're not talking about the face, though, I wouldn't worry about that until you're 100% positive you're going to be getting head some time within the next week or so.