


Find other common intervals in the keys of D and G (thirds, fourths, fifths and sixths) and practice playing them (but most importantly get used to how they sound). Find out where the octaves are (when pushing, two buttons on the same row with two buttons in between make an octave, when pulling you’ll need three buttons in between). Learn to play scales in D Major (try starting it on E, A and B instead of D to get used to the sound of the other modes) and G Major (try starting it on A, D and E instead of G). If you want to learn the instrument, I’d say you have to learn which button and which bellows direction makes which note.

Seems to me that notations like meowguy described would be good for teaching a tune to someone who wants to learn a tune without learning the instrument.
