Ah Mr. 47, very cool character. The movie The Transporter reminded me of him. The drawing looks pretty good so far. Personally I have a hard time drawing anything before I draw the head. But other people work differently. I noticed that you don't use those basic guidelines and shapes. I can't say this enough, but a good drawing starts with the good guides. There are some people who can visualize an image without them, but I can't do it. Learn the guideline method, practice daily, and you will get better. Until it's finished that's all I can say.
That and maybe shrink the size down after you scan it so we can see the whole image easier.