i use a mouse with my right hand on a steelseries mouse pad. i go to the range and round the corner peek out the door and hit the targets in the air to set my mouse calibration, 1 calibration for assault rifle 1 for sniper. if i round the corner too fast or slow to hit the target i adjust my mouse settings. then i fine tune it from playing games.
here's my method;
i wish the game had ps4 controller support like apex legends does. i prefer using the ps4 controller in that game.