What’s she doing with a bloody mandolin? There’s already enough mando/uke confusion out there. Luckily, most commenters were distracted by the drummer.
This will see you most of the way:
Twice for D, once for G, once for D.
For the A – G – D – A chords and the end of each verse just do the first half of the bar (four down strums) for each chord.
With the song just being 3 chords, it’s a great place to start playing with chord inversions (playing the same chord in a different way) and chord substitutions (playing one chord in the place of another).
A dead easy chord substitution you could use in this song is to use 7 chords (D7, G7, A7). And of course, you’ve got inversions of the 7 chords.
Put these together and you could play a verse like this:
She didn’t request it, but this one is for Ida.