Can you help me push this further?

[chrisbojan]

Hey guys !
Here is a random character that i painted.started off from witcher 3 -vimme vivaldi but ditched the reference in the middle of the sketch and kinda went on from there.

I think i currently have the following problems:
-the folds are not believable?
-the hands are not believable?
-the hair is not rendered that good?

i would want to improve what i did wrong so looking forward to your thoughts/critiques