There are three main types of chords: major, seventh and minor chords. You have already learned one major chord and one seventh chord. The first minor chord you will learn is the D minor chord. Minor chords are indicated by a small "m" written after the chord name, e.g., Dm. The notes in minor chords are shown in purple.
To play the D minor chord, use the first, third and fifth fingers of your left hand. Once you are confident you know the chord, play it one octave higher with the right hand. As with the major chords, the fingering will be reversed for the right hand.
Next, practice changing between the chords Dm and C. Remember that the fingering is the same for both chords but the whole hand moves.