One of my favorites! With capo on 2nd fret, and the low E string turned down to a D for her finger picking, it's played like in D.
The intro is, based on 4 beats to a measure:
| D D D D | Bm Bm C Bm| D D D D |
Then when singing 1st & 2nd verses:
| A A Bm Bm | D D D D |

That's a start