Like the OP I’ve never had a formal one-to-one lesson with another bass player. Imho everything is a lesson from every musician that you bump into, watch or play with. I find I’ve been playing pretty much constantly and relatively well now for nearly 50 years, but I’m always learning new things, watching other people with super superior technique to me and nodding sagely 👴
part of the reason I’ve responded to this thread is that I’ve just been asked to teach somebody’s teenage son the bass and I don’t really see myself as a teacher, having never been taught and so my thinking is that I could be a guide/mentor because I won’t be teaching anybody any dots. He is 3 years in and not too shabby. I can probably help with unlearning some of what he has already been taught, then get to accuracy, dexterity, fingering, some psychological stuff and some extended technique and assist this young fledging find their own path to bass righteousness 🤘🏽
trouble is, I’ve got no idea how much I should charge 😀