tips/advice for fingerstyle PLUS singing

I'm really struggling with playing [acoustic] fingerstyle and singing. Looking for advice, perhaps a good youtube that really helped you get over that hump, or a song recommendation that's easy to learn/pattern with singing strongly syncopated to the beats? There's a lot of stuff out there, so hoping to get to the cream of the crop. What's that one trick? :)

I'm an intermediate in general. With a pick, I can play easy to complex chords and some single bass note picking while singing just fine (although, oh the struggle to get there....getting my hands to work independently so maybe playing/singing is the same issue). I can play fingerstyle like Is There Anybody Out There or Broon's Bane, but I am a Travis picking noob. So I definitely need to work on that probably first. However, I'd like to be able to sing while picking as well, and maybe build on the travis starter. Even with something with Goodbye Blue Sky where there's very little singing, I just can't seem to put it together.

I'm open to any many music suggestions, although I'm guessing folk or bluegrass might be my best bet (and Travis, with a dependable bass vs unique lines, I suspect). I think I'm really looking for something really easy/slow that I can play along with is a good start. Suggestions for songs? Practice ideas that helped you? Thanks!