@leftyclawhands I’m substantially younger than you, but I led a somewhat misspent youth and ealy adulthood… come to think of it early middle age as well. As a consequence, each and every one of my fingers has been cut/displaced/sprained/bruised into immobility. Thus, I can only properly straighten out my thumbs and 3 of the remaining eight. It’s not stopping me from sounding perfectly horrible 
Microshifiting is what saves me. Of course we all want to play as well as we can and have musical goals, but most of us are people who picked up the bass late in life for reasons of our very own. For me it’s a middle finger to all my lifelong naysayers, who said I’d never learn any instrument. Whatever the intended endpoint, the main goal is to enjoy the journey.