Sorry for the delay in response.
Looks like the main chords are Em, G, D, A.
I wouldn’t play this song with a capo personally. With a capo on 2nd fret the chords would be Dm, F, C, G.
The alternating thumb roll would work well as well as the forward-reverse roll.
You could do some basic 2-4 slides on the 3rd string over the Em and G chords to add some easy licks to break up the rolls.
If you’re still having trouble let me know.