Your first two chords: Em and Am
For Em, fret the A and D strings at fret 2 and let the other strings ring open. For Am, strum from the A string: D string fret 2, G string fret 2 and B string fret 1. Don't strum the low E string for Am.
Read a chord diagram
Vertical lines represent strings and horizontal lines represent frets. A dot shows where to press, 0 means play the open string and X means don't play it. Place your finger just behind the fret and check each string separately.
Add C, G and D
Learn one new shape at a time. Change between two chords without a beat first; add a steady strum once both sound clear. You can see and hear each shape in the chord dictionary.