Kazaya, my dear!!
well done, u have a talent, i think that ur drawings are a bit too 'hard'
try to look at other people's sketches in this forum and learn from them.
plus i also thing that u should get a sketch book at do 10 seconds sketches of the people around u, while moving, eating, haging out... etc i think that u have it in u, but its locked up and needs to come out.. so u should free-urself!