I was thinking of a piano accordion because I'm initially learning to play a standard keyboard. But I'm learning that it's not that straightforward. The PSP software is teaching me to read music. Once I get to the end of that course, (probably in another few months), the real practising can begin. That's when I need to decide on an instrument. I'm 50, and therefore a music learner in a bit of a hurry. I don't want to spend a couple of years getting to be not-bad at something, and then deciding to try something else.
It's this laddo that's got me thinking about it. What a great party instrument this could be. But just as good for the blues, jazz and folk harmonies... Everything I want to do. AND, we wouldn't have to lose the sideboard out of the sitting room to find room for it. Here's an excellent-looking starting point for the theory of it all. It's written by a guy called Jax and it has the word "pedagogy" in the link. Take me home, Daddy. Despite the wee poem, I won't buy one on eBay, because I need to be sure, so I'll go to a shop.