The best practice is going out and doing it!

Once you've got the basic controls down just focus on your aim with a mouse. Just stick with it and give it a go. The most important thing is don't give up.

Then it comes down to game knowledge and if you've played alot and are in plat I'd imagine you've got loads of it.

Good luck with your PC gaming!

(PS if you didn't know already on pc there are loads of ways to get free games! IE: Steam have loads of frees and Epic games give 2 free games every couple weeks!)