It's amazing how your picture will look after blending with a tissue. If you blend and erase too much, the light area in the jacket will appear like in the picture. Still, do not randomly rub over his eyebrows, eyes, nose, and mouth. His hair is easy since you'll add highlights later. Another thing, don't draw small. Draw on an A4 (or 8-1/2 by 11) paper size (like typing or copy paper). I use almost all the paper to draw in the head and neck so the shading areas are large enough to avoid important features.