If I can give my own bizzare advice, learn to do it right by doing it wrong...
one of the big things that you get from learning from art books or another style is that there is a right way and a wrong way to make things look like when you think of a cube in art, it's like...
..._
././|
|_|/
but if you drew it whay way it is, you'd get...
._
|_|\
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when I started to try drawing seriously, I was always put down by it not being spot on right away, so I exaggerated proportion, making monsters with large claw like hands, or squinty eyes or extremely boney arms and legs. By doing that I could see how I was wrong while still being right...
Everyone knows for sure what inyasha looks like, but when you screw up a OC demons hands, people think, "It looks wrong, but I don't know..."
I dunno, just a thought I remembered when cleaning up my scraps...