Hi Pat,
I think you're doing a fine job so far and it may be too early for suggestions on the uniform. Are you going to take this drawing to the edge of the paper or give it a more 'unfinished' look? Or, if you feel the uniform is too dark to work from, try working from a dark suit with similar lighting.
And regarding the lighting, it appears to be the strongest from above his right and some softer light from the left. Even if the light from his left were natural light from a window or flash bounced of a wall, the highlights you put in his eyes are too strong. I would put softer highlights coming from the right, although it seems that the original light source was high enough that his eyebrow/bone structure prevented a highlight in the eyes. I think, so careful where you place them.
Good luck (you're at a point where you don't need it anymore
) with the finish.