Book structure

Let me set the scene of how this book came about. I had a dream and wrote it down when I woke up. Something about the dream sparked creativity and here I was writing a book about this dream I had on a random Tuesday night. No structure. No real plot of ending. Just a cool thought I created unconsciously. But as I started writing it I started to build a world and a purpose for the entire thing. More writing. More thinking. More structure until I realised that the whole point of the book was the concept of people staying somewhere that is comforting and familiar instead of stepping into the unknown for the chance of something better, but the sacrifice of potential failure. And now I have this 3 book trilogy that is deep and emotional and full of incredible self discovery that all came from a dream that clearly was me dealing with my own fucked up feelings and emotions. What a rollercoaster!