Hi lachenal74693,
Thank you for the recommendation. Once I'm feeling more 'brave' I'll take a look at Australian Bush music Anglo Concertina Tutor: https://www.bushtraditions.org/tutors/concertina.htm
I don't have a button numbering convention. I've just been following the Anglo 1,2,3 book. I see there are a lot of different systems though. It may get confusing for me!
Thank you for replying to my post.
Helen.