he looks mexican. big eyebrows, the shading looks like a 'stache, his eyes are wide open, nothing really tells me he is bruce lee, more like pedro haha
no but in all seriousness if you freehand traced it, try to see if it's logically, dimensionally correct with a photo overlay, that's what I would do.
I'm not one for giving advice, being a pixel noob and all. Take it with a grain of salt.