Tired of getting 0 kills every game and being dead weight how do I improve

  1. I don't know what role to play: I'm either doing nothing in terms of value for the team or getting elims this is a minor problem as I'm still trying out all the agents

  2. My aim is bad I'll stand still shoot and the bullets still whiff or if not my opponent just crouches and I miss all my shots. I practice in team death match and in swift play but Im never able to do anything most of the time because I just die

  3. I don't know what I'm supposed to be doing: I'll use my utility and then follow my team I don't know where I should be looking or what I should be doing