hitscan lover

To train properly you need to target specific things like improving your tracking and doing set scenarios each day. Kovaaks has real guides and playlists for beginners.
https://docs.google.com/document/d/1TpFHOg6WbPS2iFie2z53AnyQTXQ_ZBg7lKNqjvWhXIE/edit?usp=sharing
https://docs.google.com/document/d/1d1FY1qbwrgdj2K1wmhktbdcgG0ybeK3YJSeZ49yraW4/edit#
have links to the playlists & instructions.
The tracking playlists included are worth working through for everyone as it's the most basic of aiming styles that carries through in everything you do too.

If the guide says to increase your sensitivity or change FOV then do it. If it says to do it for a set time then do it and don't go over.
Rest your arms, fingers and wrists and do not play your game for more than a couple hours per day. Recovery is just as important as training, don't over do it.

https://github.com/KovaaK/SensitivityMatcher/releases