Guitar Tablature: "Swing Low, Sweet Chariot" by Wallis Willis
"Swing Low, Sweet Chariot" starts with a one-beat pickup, and the guitar rests for that beat. Notice that beat 2 of measures 2, 4, and 6 has two strums instead of one. Strum those beats down and then up with each strum twice as fast as a regular strum.
To play Swing Low, Sweet Chariot, you need to know how to play D, Em, G, and A chords; how to play down and down-up strums; and how to sing like James Earl Jones.