nononono don't be like that!
Never be ashamed to post your own artwork and stuff just because of someone else's, because thats a step in the wrong direction to improvement!
Everyone is at different levels, it all depends on how much time each person gets to put into it.
I draw at school, I come home from school and draw until I sleep.
You may not be able to put that much time into it, but if you do put time into drawing, or into something anything, you should always be proud of how it turned out!
(probABly not the righT time but before i forgot here I was trying out a new style)