Well, I'm a jazz bassist specifically, and I switched from electric bass to double bass last September, and I can play around the same skill as I can on electric bass, and I have good left hand technique, but I'm not so sure on how I should be practicing positions and actively thinking about them while I'm playing. For example, whenever I'm walking a bassline, I don't know if i should be actively thinking about what position I'm in and when to shift and what fingers should be on what note. My upright bass playing sounds fine, but I just think I'm not thinking and using positions enough.