There are three main types of chords: major, seventh and minor chords. You have already learnt some major chords and some seventh chords. The first minor chord you will learn is the A minor chord. A minor chord is indicated by a small "m" written after the chord name, e.g. Am.
To play the Am chord use the first, third and fifth fingers of your left hand as shown in the diagram.
On the recording there are six beats to introduce this song.