Recently, my school started a Jazz Band. Wanting to learn a new instrument I stepped up to play bass guitar. After a few days of practice, my band director told me I needed to learn plucking to play properly. So of course I started practicing, but I have been having a few issues. Firstly, I have issues muting the strings that I have played when I am descending down in note value or vertically up in string. I can't quite catch them and mute them. Also, I have issues stretching my pinky for some scales. Does anyone here have any advice or exercises I could use to improve my technique? Any assistance is appreciated.