you can use the sequencers to enter chords and chord progressions one note at a time. look up some chord progressions and copy them into the sequencers.
or try this…play a chord (say c maj) into the endless sequencer. get the sequencer running and hit c, then f, then g…you just played some new chords and made a chord progression.
the op1’s sequencers and great at helping you make chords and chord progressions. over time you will become good at making and playing chords.
You can play A minor on just the white keys (relative minor of C major), so with the master tuning control, you could have any major/minor scale you want.