Took up morris dancing when I was around 17 (1975 ish), which was, as far as I recall, the first time that I encountered concertinas/melodeons. Bought myself a trusty Hohner pokerwork about 4 years later, and a 20 key Lachenal about 4 years after that. Then, being single and without cares and woes, bought my current 36 key anglo. Then got married and kids came along so the concertina was sidelined while I concentrated on the melodeon, which I was better at, and played for morris dancing (when not dancing). Kids have now lefty home & I am retired, so now taking the concertina more seriously, having lessons etc.
Hoping to get back into a Morris team this year (As a musician - my knees are shot) to get into playing out again.