has anyone got any good exercises for flat work and jumping to encourage concentration, proper use of hind leg and listening to the rider?

Hey Im an average athlete with an average vertical. I can grab the rim, but cant quit dunk yet.
I wanna be able to dunk for my up coming basketball season just to add some more weapons to my game and maybe go past high-school with basketball, after all its my dream to play ncaa. clearly i’ll need to jump better to do so

i really want to be able to jump higher and run faster it’ll help me out very much and if i can jump higher ill finally be able to dunk my basketball at my house and the running faster will help a lot and i need help getting tired less easy