Sounds like you'd be better off knuckling down as opposed to being on here! Ha! Joking aside, you sound like you'll be more than equipped to do the job at hand. I'm just in the process of getting my first double bass. From talking to friends who are further down the line with it then you or I, they seem to adapt quite quickly. I'm (slightly) more concerned about my left hand technique for any audience members who are perfect pitch but then I think I'm happy to learn by my mistakes. With your references to Americana / country / rockabilly it sounds like we're doing similar stuff. Best of luck with it.