Ain't No Grave (Bethel) Advice

Hello everyone!

I am playing with a band in a couple of weeks and they are playing the song "Ain't no Grave" by Bethel. Since there isn't actually any banjo in the song, we thought I could fill in the background, which should sound really nice with this song. The issue I've been having is how to best fill in this song- if anyone has any suggestions (rolls, chords, etc) that would be awesome. I am still pretty beginner with Banjo so I'm not doing great with this so far!
Here is the guitar sheet that band is using and what I've been working from to get ideas:
tabs.ultimate-guitar.com/tab/b...s-2473666

Any help appreciated!
Thanks.