Do you think i have talented?

You have plenty of talent. actually, natural talent can be a difficulty for art teachers (and teachers in general) because they usually have instinct that makes most of their decisions for them. Remember, art teachers are showing people (many who don't have much talent) how to make art. The most important thing to remember that skill/craft is only one part of art. Concept, content, material choice, title, editing, composition, creativity... so many things go into art outside of just copying nature. I love that you have studies that you acknowledge are not art, but only practice, that is a great practice especially at such a young age. You are as good now as many art students in art schools so you should have no problem going into art (teaching has almost nothing to do with artistic talent so I can't judge that). I suggest that if you want to teach you should start now. Teach sunday school, teach kids you babysit arts and crafts, teach your friends, become a tutor, a girl scout leader (helper), a coach, start an art club for elementary kids. If you think that teaching college will mean you won't have to teach kids without talent you are wrong, they are all over and it not a bad thing. Everyone has the right to make and enjoy art. Best of luck.