Good advice, Marje!

About half of my repertoire I've picked up by osmosis, hearing many versions sung over and over.

A small number come from my own family tradition.

Some from extensive recording trips to local source singers.

The rest from books and recordings. Unlike some people here I don't necessarily feel the need to always go back to the source singers. Their versions are just snapshots, just like other revival singers' versions and my own. My reasons for learning a particular song are multifarious but usually they centre on my own enjoyment of the song and anticipated enjoyment of any audience.