The melody of I Smile by Kirk Franklin runs 599 notes across 60 bars, 4:57 long in Gb at 72 beats per minute. The tab sits low on the neck, mostly under the fourth fret, 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 Smile chords and lyrics.