Here is the first chord in the series of essential chords you should learn as a beginner.
Here we have the E or (E major) chord. I always advise my students to place their first finger down first on the G string 1st fret then place the 3rd finger on the D string 2nd Fret followed by the 2nd Finger on the A string 2nd fret. Make sure that you bridge the finger over the open strings. All 6 strings are used in this chord.