Accordion notation symbols?

[CowboyWay]

I'm learning the accordion and more specifically a stierche harmonica (aka a button box) that is diatonic type (different notes on push vs pull). It's fun, but the teaching methods are mostly in German which I've learnt using various books. I have other American polka music for the same instrument, but they don't use the same notation I learn from my earlier books. I'd like to convert a few pieces to speed up my learning. I've attached a few pics of the notation used.

IMG_4384.jpg (213.92 KiB) Viewed 2514 times

For the base line, you'll see another sample that has long horizontal lines that indicate push or pull. The Upper and lower case letters indicate a base vs. chord button to press.

IMG_4383.jpg (171.67 KiB) Viewed 2514 times

I'm trying to figure out how to create all these notations in the software? Any tips or suggestions?
thank you!