The melody of Aquarius/Let The Sunshine In by The Fifth Dimension runs 191 notes across 60 bars, 3:14 long in C at 120 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? Aquarius/Let The Sunshine In chords and lyrics.