I don’t know why, but every so often I can’t help but to enjoy a little folk music. Irish songs are a particular favorite of mine, to include:
Oró, Sé Do Bheatha 'Bhaile
The Black Velvet Band
Another Irish Drinking Song
Red is the Rose
Star of the County Down
Spillwark (Plattdeutsch Folk)
When it comes to folk music, I highly recommend the duo TinWhistler. Their reportoire are irish reels and jigs and they regularly post their performances on Youtube and have released an album on Bandcamp as well.
Other kind of folk music which is in my personal opinion particularly worth dipping one’s toes into is cajun
Cajun Country Revival - You Won't Be Satisfied (Live at Pickathon) - YouTube
My folk playlist on Tidal. I’ve been building it for a couple of years now. There might be a few anomalies from transferring between services.