The Circle of Fifths was a great post for which I read and saved. One not mention was done by Creatr entitled the Braille Piano Method for which he has a series. Folks may find that also resourceful.
https://steemit.com/music/@creatr/the-braille-piano-method-lesson-two-chords
Excellent, thanks for sharing the link! That's what I'm hoping to achieve for musicians here: easy access to resources.