No textbook can prepare you for being in charge of people for the first time. All the plans you made in the glow of promotion to manager collapse in those early days with the realisation that people do not always do what you tell them to do.
There are two accepted ways to deal with this. You can try to enforce your will or you can accept that your team know their jobs and allow them to get on with it.
Douglas McGregor called these approaches Theory X and Theory Y. You may not have heard of McGregor or his book The Human Side of Enterprise. But whether you have heard of him or not, you probably manage, or are managed, according to one of his two theories.