Batt

I’m a 16 year old who’s very interested in learning how to play the concertina but I don’t have hundreds of dollars to spend on one lol my birthday is coming up fairly soon so I’m planning on spending birthday money on one but even then that’s not going to be enough to buy most of the ones I see online. I think im mostly interested in the 20 button ones? But I am extremely new to them so idk what type/style I should get or how to even get my hands on one, any advice is much appreciated :)