Now something seems a little wrong with the direction this thread is going and frankly it disgusts me.
I can understand the whole liability thing, but that is NOT the issue here... The kid wants some help bringing his folks around so that he can get into shooting safely and without anyone getting in trouble. He came to one of the best known firearms forums in the country for advice on how to talk to his parents. Telling him he's screwing up from the start and "just wait till you're 18" and all that other hogwash isn't helping.
As gun owners ourselves we should be giving him the same advice we'd expect our own kids to hear, IE: Take it up with your folks, suggest taking a family safety course or go to the hunters safety course with your parent, etc... He seems to be asking how to get them involved so that they'll feel more comfortable with him shooting.
Sure he's probably got ulterior motives but that's why he NEEDS the safety classes that have been suggested by many of us, and explaining the rules of firearm safety &etc, the basics, or even helping him figure out just how to talk to his folks about it can only be a good thing.
Telling him to sod off and wait till he's 18 isn't the way to welcome a new shooter. How many of you waited until you were 18 to start shooting because that was the law? There are legal ways around the age limit for pistol and firearm possession for this specific reason; because firearms and shooting sports are an important part of our culture and heritage.
To the OP: My best advice (other than take some classes both alone and with your folks) is to get your folks to sign up here at THR and you can learn together, and maybe they will understand where you're coming from better, and be more amenable to your desire to become a shooter. The NRA isn't the only group that offers safety courses either. Check with your local DNR office too. Ask around local gun shops. You'll find something suitable with a little work.
Good luck.
Just my $0.02, take it or leave it.