I am thinking about developing an on-line course for credit, but it would be a great deal more intense than this. But it would be fun and a great deal of people could take part. I'll let you know if it happens.
I'm thrilled about all you are learning. The really great thing is that you can now google up any of these artists or "schools" of artists to learn even more.
Watercolor is not my specialty. The comments made (by others) in "class" #1 about Homer were great. Another American 20th century watercolorist is Charles Demuth. Some still wonder at his technique. Here's a still life by Demuth, probably from teh 1920s or 1930s.
Me, I prefer pastels. It seems that artists work well with wet or with dry media, but rarely both.