Your colour study is going well, when I approach a painting I mix a lot of colours early on and try and establish a palette pretty early on, switching colours often within the same hue range, seems to help achieve more textures and levels on the piece. Another thing to remember is your shadows are nearly always the opposite temperature to the light source, which you’ve seem to have done well.
Your pencil sketches are good, but coming off a little flat, use longer strokes, make breaks only when you should need too. We also need more bodies in motion!
p.s. the wolfbane paintover looks great, you should paint over the lines too.
Respect is the ultimate currency.