SheLaughs

The best advise I can give you is the same thing I tell all the managers I train: Watch. For a month or more, just watch. Learn people. See how they do things. This will help you tremendously when you start really being a manager. You'll know how to approach people, you'll be able to explain why you want to change certain things and give examples of why what's being done now doesn't work, and you'll know your team. Best of luck!

I work in home care as a nursing supervisor. Let your nursing supervisor know that the child is too heavy and requires equipment

You have done the best you can. I've never heard of an employer arguing over one day, how petty! It's their loss. By the way, LPNs are nurses.