You need to find other musicians to play with, one's that are better than you are. The best case scenario is being in a band where you are the weakest link (initially) so that the only thing holding you back is how much work you yourself put into it. That's the easiest problem to address.
I liked your P bass = manual car driving skills analogy bit at the end. Definitely why I'm a 'P bass guy'. It's limitations are where I find my freedom. Cool vid 👍
Blackstar fly 3 battery amp.
Practice anywhere loud or silently with headphones, mp3 in, fits in a gigbag. 80 quid.
Sh!t hot.
https://www.gak.co.uk/en/blackstar-fly-3-bass-battery-powered-practice-amp/130750
Been rekindling my love for The Cramps today actually! Been a long time but I heard I was a teenage werewolf on stranger things... that gig they played in a mental asylum is brilliant!!
OK, as you were..