How long does it take to learn how to play bass?
It is less complicated than guitar where you need to play chords, melody, fillers, riffs and solos. When you play bass, you still need to understand how all the notes you play relate to the chords and use all the notes on the scales in musical context although you play bass lines which are one note after the other rather than chords. Also, you can get away with just a bass and an amp without having to add sound effects like guitarists do.