Most folks begin with something small like squirrels or rabbits. Its important to have a mentor though. You need someone to help you out, teach you the basics of hunting and safety.

Where are you from?What about your parents? Are they non hunters? Would they mind you hunting, and using firearms etc.?

An option would be to find out where the local SCI chapter meets. Try to go to the next meeting and talk to the Pres. of the chapter. Tell him your story. SCI has many youth hunter programs. You can meet some really nice people that I'm sure would be willing to help you out. If you're unable to go to the meeting drop an email to the officers....

There are lots of organizations that you could check out as well: Wild Turkey Federation, NRA, Ducks unlimited, etc.