Here's what I did last week, using the above still for reference:
I sat down for about an hour, I think, and did this in a single sitting. It's unfinished—I have not been back to work on it a second time. There's a lot more I could do with it.
The trees are a bit one-dimensional, but overall, I like it. I'm trying not to judge my results. In the past, I've had a lot of trouble drawing, because I can clearly and completely visualize finished drawings in my head, but I have difficulty rendering them. I don't like it when a drawing doesn't come out the way I see it in my mind's eye, so I abandoned drawing altogether for years.
I decided to try again, and see if I could enjoy just drawing what I see, with no expectations. Who says it has to be perfect? I'm accountable to no one. And anyway, I don't have any formal—or informal—drawing training, so any result is okay.
I enjoyed doing this one, and the others I've done. I'm going to keep working at it.