I have recently come upon your Vlog and video lesson. I love them. However some of the books, like the practice routine one doesn't have tab with it. I can't really read music for bass. I played piano and tuba for years, so I do know how to read music, so it could be done but would take me longer on the bass. With all that said, what level of skill should a person possibly have to start your courses. My musical theory skills are very low.