This is just another great song, if you're looking for something new for your acoustic guitar. Tune your guitar in standard tuning, which is EAGBDe. Other tunings might not be right for this song. You should start by learning the chords G, D, Em, Asus4 and lastly Em. Try to memorize then as good as possible, and practice them a lost, until you've mastered them. Watch the video to learn the full song, the strumming pattern, and of course, the lyrics.