I forgot to post the update:
Gloves and shoes finished, next thing I have to colour is the pants (or jeans or trousers, or whatever you want to call them).
I agree, cleaning everything is hard, but recently I thought of doing one piece of the sprites at a time: I worked on the gloves and the shoes, I will colour the pants on all sprites, then I'll proceed to the arms, then his shirt, after that the head, all to keep some consistency.
I'm not smart.
Joking, but yes, like you said later, I think it's better to redraw everything, so I train more in spriting. The knee movement might be exaggerated, so that will be one of the first things I'll fix.
Thanks for the comment.