Hi Jim, yes, there are actually a lot of free courses available (that seem to run in cycles). One site is
https://www.coursera.org/, and the other is
https://www.futurelearn.com/ I am not sure about the details of their certificates (since this is my first time), but the courses are informative. Coursera has the "Songwriting" and "Introduction to Music Production" running (now), and FutureLearn has "Critical listening for studio production."
The songwriting one comes across as poetry, and I was hoping for more music theory. Music production is a very good overview of general DAW principles... and Critical listening is incredibly challenging (for me) since it is similar to music production, but tests you by listening for differences in tracks (plus it will point out to you week 1 if your monitors are "crap"!

)