Here’s an easy one for you (assuming you can handle that F#m). The intro is just picking around an open A chord and then a D. This continues throughout the whole song (and a distorted guitar comes in ringing out the chords soon into the song).

If you want to be technical about it, when it goes to the F#m barre chord, he is playing it way up on the 9th fret and then moving down to the 7th fret for the E, etc.

And the rest of Are We the Waiting goes a little something like this:

Chords and lyrics for Are We the Waiting by Green Day

…And then it goes straight into St. Jimmy.