Torgath:

I have been a professional photographer and have art and art history in my background. No one, not even great Masters, start out producing amazing art. It takes learning, being taught, and a lot of practice.
In the Renaissance, young artists, Michelangelo, leonardo, etc. apprenticed themselves to teachers and then more established artists. Even when they became established, they did not work alone. They had staffs of artisans and apprentices. When stuck on a work, they often called upon other artists or even former teachers to advise them.
A very common misconception is that great artists are miraculously born. From art history, we can see this is patently untrue. I am positive every one of those artists looked at some time at a piece and said to himself "this looks amateur." Most probably looked around and thought "everyone is better than me." What made them eventually into art masters is they kept going. They kept learning, trying, and creating. Very slowly, they progressed and got better.
Since you are still in high school, I would say don't worry about the job market yet. You have plenty of time to worry about that later. Right now, try and work on you. The future will take care of itself.