I am a classically trained violinist, well, actually my main instrument back in Germany was the viola. For Stephen's Day in 2016, I bought a fiddle, so I could go hunting the wren, and I've learned more and more tunes since. Started writing tunes to keep busy working behind a sometimes very slow bar.
It was quite a transition from depending on sheet music to playing by ear, but I've made great progress and can play alongs songs now that I don't even know. Playing in pubs in Kilkenny every week helps with that kind of training.