Played on Baritone ukulele.

You can play this song very easily on a guitar in standard tuning (with capo at 2nd fret) using just the top 4 strings.

There are only 4 chord shapes used in the song:

B/F#: 2220
Bsus2/F#: 2200
E: 0232
F#m: 2000

For simplicity I'll just write B and Bsus2 in the transcription, instead of B/F# and Bsus2/F#.

On most of the chords the picking-hand thumb typically alternates between 3rd and 4th strings, with the strumming of the higher strings done with the fingers, but this alternating thumb pattern is not followed absolutely strictly throughout the song.