For this arrangement I’ve taken the intro and outro of the song and made a mandolin solo sandwich. Mandolins are built for speed so I had to slow it down a fair amount to play it. And even still I didn’t play it as smoothly as I’d like.
The intro and outro is mostly octaves picked with thumb and middle finger. If your uke only has 12 frets you can just play the lower half of the octaves and it should work out okay.
The picking for mandolin section is a complete mess! Where I can I’m using running man picking (alternately picking the same string with index and middle fingers). But mostly I’m using whatever finger gets there first. Which would explain why I’m not playing it smoothly.