i think 14 is a bit young to do it (just my opinion) i would wait till your 16 at least, cause if you do get a job then you can start getting private customers and party's and you will have to do alot of driving and im sure that nobody want's to drive you all over the place. plus like MasterJ said the adults will give you more respect and enjoy the magic more. Just my opinion though.
It's a good a opinion, though. I have to agree, especially on the driving all around point you brought up. My parents would not want to drive me everywhere, and I certanly would not want them to drive me everywhere for their sakes.