I have been listening to more old-time music and fiddle tunes recently. Reading Flatpicking Guitar Magazine has opened my eyes & ears to the wonders of this Americana and often old European music. There's a tab that links to a page named "Bari Pickin'" (above, left) where you can find tablature of many old tunes in the Public Domain. Roger Ruthen has transcribed quite a few and also provided midis to get one familiar with the tunes.
In the video below, April describes the many other ways that we may learn a song. I thought you might find her insights and perspectives useful.
Here's April with her band