Get involved in your local League. CUB League is run on a volunteer basis, and we can use all the help we can get. Anything you can do to pitch in will make the League run more smoothly, and will help all the kids, from helping out at practice, to scorekeeping or field preparation. If your child sees that CUB League is that important to you, he will learn that it is important to the kids, too. Some people worry that they are not qualified.
Different coaches have different philosophies.
Some believe in having players play all positions, some want players to become good at one. Show up for the games AND the practices. It's only a couple of times a week, a couple of months out of the year. This is what the kids should be learning. If you don't agree with an umpires call, keep it to yourself.