K, I've been through this one already....
I think the biggest problem young herpers have is getting their parents to acknowledge their abilities (or prove to them that they are capable of raising a living breathing thing). The fact is most young people can't (statistics say 82% of children under the age of 16 can't even properly raise a cat on their own), raising a small delicate animal is a complex and taxing ordeal to everyone.
However, there are those few gifted individuals who have the ability to become successful herpers even at a very young age. They either have an innate understanding of the needs of the snake, or they read an absolute ton of material on animal husbandry and biology (and understand).
If you've read up on the material, and understand this snake can cost you a fortune in the long run, sure go out and knock yourself out (but understand you'll be borderline broke most of the time, like I did to myself when I was 10. I'm serious, once I had around $100, but it all went down the drain after a vet visit. Before I ever had a snake I had a constant $500 in a small stash, after I had a few crinkled $1 bills in there).
However, if you can't answer basic husbandry questions like, what temps should I keep the snake at, or what do they eat, or what happens when a snake sheds, what should I have in a snake tank, then I would reconsider about getting a snake.
In my experience, even adults who've read up on snakes and take their snakes to their vets if they have problems end up killing their snakes from simple mistakes due to lack of common sense. Unless your an exceptionally gifted 11 year old, I'm not all too certain whether you'll fair any better than the average adult.
Also, just as a reconcilliation, most people don't get to own a snake until they're 20 years old. It's extremely rare to have anyone younger than 18 years of age to own a snake (and maintain it properly). I think there was a recent poll on this, the average age last time I checked was something like 30-40 years old.
Sorry for the long post, but it pains me everytime a young one wants to own a snake, since it either means peril for the snake, peril for the young one, peril for the young one's parents (especially if those parents do not like snakes), or most of the time all three.
Some evil parents actually try to attempt to kill the snake and make it look like an accident, or just by accident end up killing the snake ("oh I was vacuuming and I put the snake cage on the window sill." "But mom, didn't you know snakes die if left in the sunlight for more than 15 minutes!?!?").
Also, don't forget the rumors their heads are filled with (oh all snakes are venomous, oh, snakes can sting you with their tongues, oh that snake is gonna come out late at night and strangle your neck while you're sleeping, oh that snake is going to come out late at night and bite your pee-wee off, oh that snake is gonna come out late at night and crawl up your butt, snakes are the devil, etc).
Think this one through, and if you're up for the challenge, then educating your parents is the first step. Like PSYCOSNAKEMON said, get them to read these forums (get them to look at the pictures in the pics gallery! They'll gape at how pretty these things are).
-13mur 6