You have set a goal for yourself that would intimidate even a seasoned writer.
You want to write a thought-provoking, deep, focused (un-scattered) and unique book.
While you're at it, you want to enjoy the writing process, somehow bypassing the life-eating, friendship-threatening, doubt-inspiring nightmare which most writers must endure for sake of their creations.
My suggestion is to scale down your short term goals and build some tools in preparation for your future, larger-scale literary journey.
Instead of writing your book as a single monolithic masterpiece full of wisdom, wit and transformative insight, write a short story using one of your book's characters, a little of your book's setting and a fraction of a shard of its deep thought-provoking theme.
Write 1000 focused words.
These don't have to be publishing quality words but they should fulfill the rest of your requirements. They should be unique and deep. They should contain something worth reading while simultaneously leaving the reader hungry for more. Don't worry about fitting them into your larger book project. This isn't about that daunting work. This is about learning to love your characters, your setting and your subject matter. It is about finding your narrator's voice and that narrator's preferred psychic distance. It is about learning how to walk before entering the marathon.
You are blessed if there is a great novel idea inside you. In finding that treasure, you are well on your way to becoming a writer. But the dream is not the journey. And a truly great story is timeless. It can afford be patient, waiting on you to refine your skills, so that when you finally do attempt to bring it to life, your ability will be equal to the task.