It's generally fine. What can be improved:
1. Add another locker room (so that those who came to training could comfortably accommodate and change clothes without interfering with those who change clothes after). Or increase the time interval between outgoing and new arrivals.
2. Reduce the group of coaches from 8-9 people to 4-6. This applies especially to those who get up on skates, because the coach spends much less time training. This is important because children do not always perform correctly right away. They are not doing the exercise correctly. And they remember.
Therefore, based on the latter, you come to the conclusion that individual classes are necessary!