Nice work so far but you could make it better by putting some weighting into the characters walk. He walks as if he is being helped along by a helping hand kinda thing. He also looks a tad stiff as a result of this.

Put some more emphasis on him using his crutch rather than just as though he was a blind man using it as a guide stick.

Perhaps a little more animation in the toes.

Watching it again and again it definitely seems like his hips are too stiff.

Keep honing it kid