The melody of They’re Either Too Young Or Too Old by Jimmy Dorsey runs 336 notes across 78 bars, 2:28 long in Bb at 68 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? They’re Either Too Young Or Too Old chords and lyrics.