Thanks!If this is your own DD, then they need to learn every grip/pitch from the start. Only coaches want you to learn only the fastball. Don't listen to that stuff.
Learn 5/6 pitches, and throw the 2 that work that day. The success of those 5 or 6 will wax and wane as you progress.
It's critical they learn (early) the strategy of where and when to throw each pitch, and which pitch to follow depending on result. This is the most exciting part of pitching.
It is my own DD, we will continue to work on the other pitches....