Ok, ill start from the top.
the anatomyis out of place, and doesnt make sense, the lineart messy, but the proportions are decent, so you dont need to fix that.
the colours are decent, though the skin colours could use some mroe contrast,and you could probably reduce it down to 3. the shading lines need smoothing, just like the lineart lines. if you have the lightsource from behind him, you would see barely any light on the shirt or arms, certainly no highlights. its coming along nicely though
