The song is in standard tuning in 2/4 time with an acoustic. Overall
it's really easy, but you really have to get the groove for it.
Here is the video for it courtesy of YouTube:
Overall Theme
This is really the overall theme. Once you get this, all that's left
is following the codas. All you have to do is remove the lead for the
Verse/Pre-Chorus/Chorus.
Here's just the rhythm:
Here's the rhythm with the lead added:
Bridge
Here's where it changes up a little, but you mostly still follow the
theme from the Intro: