I don't believe practice starts until after school is out. Coaches change each year, as it is a volunteer basis. Kids for each team are picked in a draft once the coaches are all decided and we figure out how many girls are in each age group. I am not aware of there being many problems with the younger girls. There is some drama with the older girls, of course, but most of the kinks usually get worked out. When my daughter was your daughter's age, she had girls on her team that were very good and some that weren't so good, but they all got along for the most part. That is part of the coaches job - to make sure the kids play as a "team" and encourage each other, not cause problems.