I'm not a teacher, and so my response will probably be of little use
but I believe the Suzuki method is geared toward kids younger than you. I spent 4 or 5 years on the suzuki method when I was very young. it's an ear training program as I recall, play what you hear kinda thing, your parent is supposed to work along with you. You do look at sheet music, but you're not really sight reading it. I think...
of course I rebelled against piano and quit then because "I hated it 'cause mommy makes me do it" and now 20-something years later, I've begun taking classical lessons from a talented teacher.. I think having that background, though I remember little of it, has helped me progress as quickly as I have on the piano over the last year. (well, that and having played bass in bands for the last 10 years, and now practicing piano 2-3 hours a day helps as well
but there's definitely some subconcious foundation that was built long ago with those suzuki lessons)
I would find a teacher you like, but (and an actual teacher may correct me if I'm wrong) with 6 years of playing under your hands, at 14 years old, I'd think you were ready for a more "serious" study as it were with the guidance of a good teacher.