This is how you play the D chord on guitar.
Tune your guitar
Tune your guitar to the standard tuning (EADGBe)
Index finger: 2nd fret, 3rd string.
Place your index finger on the 2nd fret of the 3rd string.
Middle finger: 2nd fret, 1st string.
Place your middle finger on the 2nd fret of the 1st string.
Ring finger: 3rd fret, 2nd string.
Place your ring finger on the 3rd fret of the 2nd string.
Play chord.
Strum all strings, except the 6th and 5th strings.
guvnaguitars.com/chord/d/