I rather like the stance of your character, it really gives it life. The colours could use a little work though. They're too saturated right now, the contrasts between the colours give it a somewhat 8 bit vibe. Maybe you could use another darker flesh tone to outline the face and arms.
The legs are also a bit difficult to read, they left and right legs blend into each other too much. Again maybe it could be fixed by adding another colour or using black to differentiate between the legs.
It's a good start though, keep working on it. I think one of the problems you may have with colour selection is that you're just using the darkness slider in the colour picker to get the different shades. Doing that deprives your palette of life. Try going to the hue mode of the colour picker (the radio button marked H) and picking from there before darkening it with darkness.