I hired a couple of Big Ten SS and CF players to work with my boys when they were 8-10ish....goal was to teach them skills and most importantly have fun along the way. I told the college guys I don't care if you only work on something 20m out of 60m I'm paying you the same rate. Play games, get the gatorade going, laugh. Boy. this went along way toward their development and enjoyment of the game. I figured focus on the middle of the field where the best athletes play. If you gain those skills and recruit the necessary athleticsm you'll likely find yourself on the field. OF course, hitting is a separate thing, and always the key of staying in the lineup. We worked hard on that as well.
It all worked out. I - they had zero control over where the coach wants to put you. "Hustle and go be the best you can be that day, and be the best teammate you can be."