• This course has a free two minute video that explains most (see next)

• For pc (not phone) users click on square symbol lower right to go full screen

There are perhaps some more criteria

Read this in the book or e-book in chapter 6 (how toxic is your dentist), chapter 9 (fear), chapter 10 (art), chapter 14 (no crowns), chapter 15 (less is more), chapter 24 (the source). Know what is possible. Ask for it.