I learned many things with this fish. First, I got a new camera, a Nikon coolpix, $150, and it does everything I ever dreamed of and more which I hope to learn about. Then: I laid down my white highlight areas first and worked into them, much more successful in keeping the whites clean. Also: I bought of tube of Cadmium Green to experiment with and it makes subtle but light filled greenish greys, very happy with this.
In addition, I went blogsnooping and found Dan Carr. (Google him, I can't remember where I found him.) He has painting videos! So helpful. His blog is very journal like, with lots of erudite information and musing. He did mention this term, though, that made me cower: excess color syndrome. I might have a case of ECS.