In the normal speed audio and the ActionTab, you can hear both lead and rhythm guitars together. However, in this ActionTab we show just the finger positions for rhythm guitar, and we'll be doing the Lead in the next ActionTab. The song is played at a moderate speed but is actually quite easy - the chord changes are straightforward and the strumming very regular, making this a good tune for beginners.

The intro to the song is not as hard as it may sound. Just use consistent downstrokes with your pick. Meanwhile your fretboard hand need only hold 1 note on the fretboard. Pick both the high strings together, and only those 2 strings. Keep your hand / pick close to those strings to get the consistent speed up.

Pick the D / E notes 32 times.
Pick the C# / E notes 16 times.
Pick the C / E notes 16 times.

Just move your first finger down the B string by a fret each time. After that, it's a regular strum through the following chords...

G major
E major (get used to this chord, it's played a LOT in this song)
G major
A major (strum once and hold)

Then for the choruses...

G major (just strum once before the beat, skip it if it's too tricky and go straight to the E major)
E major
A major
E major
A major
E major (lots)
G major
A major

Those are all the song sections, just re-use them as required.