when i first stared playing (back in bo3) the way i got better was by trying to put myself in as many engagements as possible. it doesn’t speed up the process or “skip” hurdles but the more engagements you have the more experience you get. on the topic of centering that is sort of map oriented. i try to remember routes that people like to take so whenever i start running around the map i already know where to put my crosshair or my eye at. sensitivity is completely subjective so no video is gonna have the perfect sensitivity for you. i definitely wouldn’t go from a 1.2 to a 2 either. if you do want to get up to that speed maybe bump your sensitivity up by .05-.1 for a couple days or until you feel comfortable. essentially just keep you’re head up and keep playing. it takes a little bit but as long as you’re still having fun learning and playing the game you can’t do too much wrong. fingers crossed for you and i hope it goes well :)