Hi,
I am beginner and this is a study of modeling.
Concept by Derek Blair (http://derekblairart.deviantart.com/)
Is the modelsheet made by yourself?
Not too bad. The original drawing has more exaggerated forearms, and the eyes aren’t as round. Does your model have eyelids? The drawing shows some asymmetry between the eyes, which appears to be mainly eyelid shape.
I think the concept has crease of more sharp edge.
base modelling is good!