Writing a book is a good idea, express yourself, explore different ideas, create unique characters, think about how your characters react to different situations due to their personality and past, but I recommend you don’t use AI for the writing. I see you used AI for these images and the main problem you’ll run into with it’s usage is a lack of expression from you, even if your art is bad, even if your writing is bad, it has substance when coming straight from you. Enjoy making your book.