I am a guitarist of a year gone bass. I am new so my technique is still being worked on. My bass teacher told me he wants me using 3 fingers and has told me not to move my thumb from a dedicated spot, meaning no muting the E with my thumb. I am cool with this technique, it feels alright. I am assuming that using 3 fingers with a dedicated thumb anchor is an accepted and widely used technique? I can see myself having trouble with muting in the future, when I begin to pick up the pace. I am assuming muting, and using which fingers where to achieve this will come naturally with practice?