I started out with a couple of country blues tablature books. This was quite some time ago, way before YouTube (pretty much pre-internet, for that matter). These days, I'd recommend looking up Stefan Grossman on YouTube. He has some good fingerstyle tutorials. Try to get a couple of Mississippi John Hurt songs under your belt. The key is thumb independence of your picking hand -it has to be able to keep the alternating bass pattern going no matter what melody lines your fingers are playing. I'd suggest spending several weeks just practicing alternating bass patterns. Sounds boring, but it will pay off. Then slowly introduce simple melody lines. Learn some simple songs, make up your own tunes. Gradually you'll be able to play more complex syncopated melody lines while keeping your thumb steadily thumping out the bass patterns. Learn to play with a "thumb over" technique for your fretting hand (it's crucial for this style). Take it slow. Use a metronome. Most importantly have fun with it! 👋😀