Even easier, and it baffles me that parents don't do this:
Ask the parents of the best pitchers in your area who they go to for lessons. Call that person. Book a lesson.
Things must be different there. The instructor in our area that has most D1 prospects has like 50 girls on her waiting list won't even take any more on it.
All top coaches have long waits and even the decent ones have some waiting list that generally takes months to get in.