It was intimidating, but each time I did better than I thought I’d done. That was interesting. And encouraging. I actually want to try to do it some more … as a practice. Yes, I surely do think it helped me stay focused on my subject. I even found that I was speaking aloud to myself ... to guide myself along. And that seemed to help.
1. It's easier to draw from a photo than real life. My sketch of the bird turned out better than I thought it would. I tried not to dwell too much on it. I got my basic sketch done in ten minutes. Later I went back and put in more detail … and later superficially painted it.
2. Definitely. Drawing from real life requires keener attention / observation. I know that drawing from real life is going to be more challenging … as there’s the 3-dimensional aspect … and the light … and that real life often moves, often quickly. E.g. birds. The bit of light in the bird's eye—I think I would not have noticed that unless drawing it.