Okay, I did it. And I am happy with the results. I knew it was just a trial run so I was able to relax and experiment. I see things I think need touching up, like the jacket, and maybe some shadows. Anyone with advice on how to improve it? This one is on actual watercolor paper. Amazing the difference using the right paper makes!
Now on to paint the domino players. I am going to try the adding-soap-to-the-rinse-water trick, to see what happens. Experiments! I feel like I need a white lab coat and some coke-bottle glasses (oh wait, already have those!)...maybe a beaker or two!