Thanks!
I learned what a "chord" was from the Magnus organ. I'd push a button marked Bflat and try to pick out which individual notes made that chord (Bb,D, F)
It had major and minor chords only.
That was enough of a start.
I remember the first time I sat down at a piano (in Prison, no less!) and saw alllllllllllll those OTHER keys available. Total overwhelm! What the hell am I supposed to do with all that???
My first breakthrough was looking at the sheet music for Live and Let Die and seeing that Paul McCartney spread his left hand chord out.
Instead of just a block chord (Bb,D,F) all placed at once.....He played them out in separate notes. Also, he changed the order of the notes.(Called an inversion). Bb, F and D on top made a very interesting and useful sound.
I started a prison "orchestra" (just three players, actually) with trumpet, trombone and myself on a knee-bellows organ:)
I'd take the Kingdom Songbook and figure out the chords from the piano notes. Eventually, one of the guitar player brothers brought in rhythm accompaniment.
One of the guys made me a baton so I could conduct, too:)
Arranging those Kingdom Songs for such an unlikely group of instruments gave me a glimpse of possibility.
When synthesizers became affordable around 1984/85 I bought one and the rest, as they say, is history.