The melody of K-K-K-Katy by Geoffrey O'Hara runs 141 notes across 36 bars, 1:07 long in C at 150 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? K-K-K-Katy chords and lyrics.