Tunefox
The Clever Way to Learn & Practice Bluegrass Music
This is a basic vamping arrangement will help you backup yourself or another singer with simple repeating rhythm patterns and chord shapes. There's a classic instrumental into, but if that's too tough for you then just skip it, or practice it separately.
There's also some great licks, so be sure to check those out. Remember to make listening a part of your practice. Use the Tunefox player and links to Apple Music or Spotify to make a playlist.