Start nearby. Try 400 DPI × 1.0–1.5 sensitivity and adjust gradually until you find your ceiling.
Test resolution separately. 1280x960 stretched works for pros, but your monitor and GPU may favor a different setup.
Import the crosshair first. It is the easiest element to try risk-free—paste CSGO-KDOkV-jUpoE-GdhAh-YzbZL-MYXTB and see if the classic static style fits your eye.
Compare with other pros. Browse settings for donk, s1mple, NiKo on take.skin to find a sensitivity band that matches your role.