The melody of Faith by Stevie Wonder feat. Ariana Grande runs 437 notes across 87 bars, 2:39 long in Am at 156 beats per minute. The tab sits moving up the neck in places, 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? Faith chords and lyrics.