The melody of Once Again by Matt Redman runs 285 notes across 31 bars, 3:31 long in Ab at 90 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? Once Again chords and lyrics.