Hello!
I am a total beginner, don’t know much about music theory, nor about accordions.
I got a Hohner Morino Club N diatonic accordion from my grandfather who passed away recently, which is why I wanted to learn to play a bit.
Buttons on the accordion:
For treble

1st line/row has 12 buttons

2nd line/row has 11 buttons

3rd line/row has 10 buttons
For base:

1st line/row has 4 buttons

2nd line/row has 4 buttons

3rd line/row has 4 buttons
I have many questions, I don’t know what C/F means and if my Hohner is truly C/F. I tried to identify the treble notes on each line, which are (I think):

1st line/row pulling out: CFACD#GACD#GAA#

1st line/row pulling in: A#DFA#DFA#DFA#DF

2nd line/row pulling out: G#ADFG#A#DFG#CD

2nd line/row pulling in: D#GA#D#GA#D#GA#D#G

3rd line/row pulling out: F#C#BEF#BC#F#BC#

3rd line/row pulling in: ECC#G#EC#CEC#C
I found the base notes to be harder to identify as there seemed to be lots of undertones (don’t know if that is the correct term):

1st line/row pulling out: FAA#D

1st line/row pulling in: A#EGB

2nd line/row pulling out: CFA#A#

2nd line/row pulling in: A#A#A#A# (all seem to be the same a#, but with different undertones??)

3rd line/row pulling out: *here I gave up because the previous line/row was so weird.

3rd line/row pulling in:
I want to know how I can learn about how to think about this system of notes. There has to be some logic behind, but I don’t get it. Can anyone suggest anything on how to approach this, how to understand it?
Thank you!