On the PBS Newshour (US TV show) today they had a segment on MOOCs (Massive Open Online Courses) that are being offered by major universities. As expected most of the content is on the tech/math/business side, I did find some stuff of interest to us more artistically inclined on Coursera.
https://www.coursera.org/category/music
Berklee College of Music is offering an Introduction to Music Production course, that looked like it could be particularly useful to the beginning, to mid DAW user. While the Cubase docs and videos do a good job of explaining how to use the various tools, this looks like it would be useful to folks explaining the “why” and “when” of using these tools.
There are also courses on Sound Design, Songwriting, Guitar and Improvisation.