I have been preparing to write a new book, but I have never prepared it properly. After much deliberation, I have not finished the old book, and there is really no way to create a world structure for the new book. And I have a strong feeling that if I don’t finish this book, I will never finish it in the future.
Don't think about calming down and writing anything else. There is no other way, just finish writing this book! So, make preparations in the near future and continue this book.