You appeared to be playing out, then in.

Try the opposite:-

open the bellows with the air-button;

i. beginning at the middle button of either left hand row: play in/out on middle key;

ii. then in/out on next one inwards, same row;

iii. and again on inner one;

iv. and finally [for a change!] out/in on inner right hand key with right index finger.

The row nearer you is C, the outer one is G.

You will find you have played a middle-major scale in the key of whichever row you chose.

Let us know if this works.

~M~