Here is the Em (E minor) chord
Best way to play this chord is to play as though your playing a E major chord but don't place the 1st finger on the fret board. Also play the E chord then the Em chord and listen to the tonal change between the major and minor chords. Notice the the E major chord sound bright and happy and the minor chord sounds very sad and melancholy. Something you will notice with all major and minor chords.