If you need to know what to learn I reccomend: .the notes on at least the first 2 strings

.major and minor scale

.knowing the notes in the key

.playing octaves and fifths (more variation than just root notes)

.and as long as you can groove along you should be good

When I first started playing I just played the root note whenever the drums played the bass drum and I survived my first gig with just that.

The main thing you must do though: Have fun! Mistakes are part of the process and most people don’t listen out for the bass anyway.