Only 3 weeks? I think you beat my record XD I was the same, sheer persistence of playing it for about half an hour a day (much to my partner's irritation). Finally getting through it felt great though; felt I could take on any song that came my way! Also, getting TWO perfect playthroughs is something impressive in it's own right.
Thank you for your kind words! It was tough, I'm not gonna lie. I must have sat at it for two hours every day until my fingers could no longer keep up. Fortunately, my wife and I work different hours. 😋 And I agree, my ambition to do two playthroughs made it a lot harder (And you know they are not "perfect"). 😅
What type of concertina did you get? I had a thought that I might want to pick one up the other day and have been trying to figure out a good starting model. Wonderful performance for 6 months by the way!!