Hi Dawn
I have software package designed to help people when writng books. Basically for a non fiction it advises that you break down into chapters titles first and then set out a goal that you wish to acheive for each chapter. For example, you may be thinking along the lines of
Chapter 1 - Thinking of leaving a religion - you could include you own experience, those of others, the reasons why people consider leaving a religion and reassurance that the reader is not alone.
Chapter 2 The Fear - To include al the anxieties people face when making such a momentous change in their lives, and again reassurance that others have faced these fears.
Chapter 3 Breaking point - The best way to leave etc
Chapter - Now you are free - The challenges faced and feelings you have when you are first seperate from the religion.
There are many more ideas for chapters that I can think of, Shunning, Making a new life, New friends, Learning to trust again, Getting help freeing yourself from the mind control you have been subjected to, Family members still in the religion and how to deal with them, etc, etc
Hope this helps
Fi