Yeah the pic works, this is just a slow forum, you just have to be patient.
It's not bad so far the anatomy is well on its way to being correct. But that's not what you asked for so I'll ignore it.
When you are rendering a piece you always have to be thinking. Think of the light source. Where does it come from? Are there more light sources? Is it a strong or weak light source? Also you have to think about surroundings because color bounces. If he's in the sun on a cloudless day some of the sky's color would show on the skin. Is he sitting in grass? What colors are around him? How close are the colors? I recommend you never use black to shade skin due to colors that surround him are showing up on him. I recommend you check out
Gurney ( you can find certain posts through the links on the lower left side) and if you have money, or a good library, check out his books which he displays on the site.
If you know what kind of light source there is check out portraits and pay close attention to the colors in the photo or even better studying someone in those circumstances (because photos miss things that you see in real life but photos are close enough).
So just always think as you lay out colors and plan lighting. It's a good start you have just start thinking hard on decisions as you go along. Also do research on shading by looking at master paintings and photos and real life and you'll understand shading better. Good luck!
