You have an extremely amazing artistic talent. Never give up, your work is very amazing, alot of it should get into museums. I mean, you are more talented than alot of the people who have gotten into them. I was at the museum of art in D.C. yesterday (which is also looking for works from the general populous, check out their site), and was looking at some of the things in there, alot of them suck. YOu have some amazing stuff here man.
ever think about trying to do the schoolastic art competition in your area? you can get information on entering stuff from your art teacher at school.....
keep up the good work and you will go far my man....