>>717150363 (OP)
Get a big ass mouse pad
Slam that sensitivity down to around 40cm/360
Play with that sensitivity for a whole week, don't skip this part
Test your aim now by strafing back and forth while tracking a stationary point. If you keep overshooting, lower it. If you have trouble keeping up, raise it very slightly.
Now you have your sensitivity, go play game until you're good.
>>717154559
Aim trainers are fun as a game though.