Well, I don't know about a writing course. I don't think I'd really have time for that. But if you're interested, I did set up a social group called Writer's Corner where writers can traded tips and ideas, and ask other writers for advice on any stories, poems, essays, etc. that they are working on at the time. If that sounds like something you'd like to join, you can join
here.
Perhaps when I have some more time I may look into doing something like what you suggested, as I'd love to help other writers improve, but for the time being, I fear that Writer's Corner is all that I can offer.