Kind of self taught........
I said to my dad I fancied picking up the bass - he dug out the Hofner, I wouldn't get my hands on the Jazz for a while. He taught me how to tune it, hold it, and walking bass. He reckoned that if could do that then i'd be off to a good start.
Then it was years of playing along with records. Here, theres a thing, did anyone else play singles at 33 to learn them? I recall that one string up and two frets up held the tuning and it was a matter of replicating the pattern once you got the speed up...... did anyone else do that?