"All I Wanna Do" is one of those pop songs on Guitar that doesn't fall into a completely predictable and repetitive pattern, there's a decent mix of different parts going on here.
It all kicks off with a REALLY fun alt-strumming section that'll have your fingers zipping back and forth between red and green notes, and it even throws in some chords, lower neck movement and hammer-ons throughout, whilst also throwing some pretty odd pattern changes every couple of seconds, a great start!
Then it transitions into a laid back country-esque twangy guitar part, experiment with brief hammer-on snaking, and even some fun chord hammer-ons too. There's a nice bit of variety here and it's not taxing on the fingers either.
Then comes a section with some pretty fun steady strumming, having you switch between three note chords, two note chords, and single notes throughout, it's more upbeat and a good contrast to the part before it. There are all sorts of little variations on these two parts during the course of the song, and they never play out the same as they take it in turns throughout.
There's also a pretty neat string of notes at the end that have you playing a 5 note hammer-on snake before ending in a hammer-on chord. For a pop song, this is a genuinely great chart in my opinion. Recommended.