I had great success with Robert Greenberg's series on music and music history. I started with How to Listen to and Understand Opera which is available on his site (https://robertgreenbergmusic.com/download/how-to-listen-unde...) and The Great Courses as well. If you want a preview shoot me an email.

He adds lots of fun history to go with it. Bach's Goldberg Variations was his greatest financial success "The Count presented him with a golden goblet filled with 100 louis-d'or." and he was obsessed with coffee. Coffee cantana by him as well.