you still have a long way to go before you can try to get something published.
keep drawing, mate
EDIT
I recommend you go to
www.conceptart.org - the biggest and most friendly forum for artists of all sorts - amateurs, pros, young, old, comics, 3D, paintings. register there, post in the right forum, and brace yourself - they are friendly but true, and taking critiques on your own art is something everybody has to get used to.
