The melody of I Have Nothing by Whitney Houston runs 326 notes across 44 bars, 3:40 long in G at 78 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? I Have Nothing chords and lyrics.