The Legend Of Korra redrawing

This is a re-drawing of the first picture that i drew on paper but digital form. I really liked the first 2 episodes of this show and i hope its just as awesome as The Last Air Bender!!!

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: i would like someone to critique my proportion and her hands on Korra (the girl) , because i always seem to have trouble drawing proportions and hands!I also have trouble drawing Backgrounds not sure what i can do in the future to make my backgrounds look more presentable.