This was the first song that I learned how to play on the guitar and is very easy to play once you get the hang of it.

All you need to know is three basic chords:
A: Should be played with first finger on d string 2nd fret, second finger on g string second fret, third b string second fret. Strum all strings


e-----0
b-----2
g-----2
d-----2
a-----0
E-----0

D: should be played with first finger third string second fret, second finger first string second fret, thrid finger second string third fret. NOTE: to really play the chord dont strum d a E strings, but if you do the song will still sound the same for the most part   

e-----2
b-----3
g-----2
d-----x
a-----x
E-----x

E: First finger second string first fret, second finger fourth finger second string, third finger fifth string second fret.
e-----0
b-----1
g-----0
d-----2
a-----2
E-----0

and now the song:
AA DDD EE DDD AA DDD EE DDD AA DDD EE DDD...so on and so on