basically i've been playing bass for a couple years and i would say im pretty good. I play along to songs almost every day (mostly metallica). I know the basics like the major scale and minor scales and major and minor triads, but I have no idea how to interpret that knowledge into fill ins and such. I made this form to ask if anybody could give me tips at what i should be learning and practicing (I am very dedicated), like new scales and things on what to study to get better at bass with knowledge and theory other than just playing along with songs all the time. I also know there is a whole lot of different types of scales and I don't know where to start. Please Help!