Aiming Faster in Games with Low Computer System Latency

How do I set up my computer to know I have around 12 ms & 20 ms latency?. And what scenario in the Kovaak do I need to play. From my experience durring actual multiplayer FPS, its about situation awareness & team communication. And long time player experience, and thinking outside the box of the computer and game. Some may refer to it as pree aim and ghost kill. For most like actual eSports team in any game titel how they achive this high aiming skills/awareness is most likely the their secrete sauce. I guess hardware specifications have a good part to play in that.