IMO someone your age should start out with Buckshot and work your way up. Thats if Buckshot is legal where you hunt. Im 34 and I shoot 00 buck to this day. I've taken over a dozen deer with it. You just need to keep them close. 40 yds tops. I shot a deer last year @ 35yds with my modified barrel and put 4 pellets right in the vitals. The pellets hit in a circle the size of a softball. The deer went 3yds and dropped stone dead.

Like I said, its just an opinion. If you have a place where you can get some good practice in with slugs and are consitantly accurate at the longer distances, go for it! They'll do the job. My father has a slug gun set up and has done quite well.

Good Luck!