The melody of When I Grow Up (from Matilda The Musical) by Tim Minchin runs 347 notes across 48 bars, 2:52 long in Bb at 79 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? When I Grow Up (from Matilda The Musical) chords and lyrics.