Not sure what this has to do with reptiles, but all right
I play the piano and violin. I am classically trained for piano, but unfortunately not for violin, though I know classical pieces. Everyone in this province is obsessed with fiddle instead of violin. It's the same instrument, just different styles and techniques. Fiddle is easier than classical violin, etc. It's like they think that unless you live in the city or are part of the orchestra, no one can play classical violin. It's somewhat funny, although my teacher discontinued lessons because of it (she felt she was inadequate to teach me classical, as she is solid fiddle).
I've known the piano for seven (or eight?) years, the violin for five and a half.
The piano is in the percussion family, the violin the orchestral stringed family.
If I chose another instrument, I think it would be the double base (which is in the same family as the violin, but it's much larger, shaped differently, and much deeper) though they are so bloody expensive. I love deep instruments (can't you tell? I've chosen the violin for it lol).
If you want to be technical, I can play the ukulele, guitar (somewhat), the organ (I can figure it out; the pumping is a bit to get used to), and the recorder. The ukulele is essentially a violin you hold like a guitar and pick rather than play with a bow (though we pick sometimes, too), so it's not particularly different. We learned the ukelele and recorder in elementary school, but that was a few years ago now.
Once you know an instrument, you can pretty much figure out similar instruments.