Well, once i was also wondering about how to increase my mouse clicking speed in order to perform better in games.
A friend of mine tell about this website CPS Counter | CPS Tester - test your cps click speed [online] https://cpstest.us/
to test and improve your clicking speed. For me that’s more than enough to enhance my clicking skills.
All you need is to practice more and more with different tools available, consequently your skills would be improved.