website and platform testing

I need someone to help finish my book, all the illustrations and content is in canva but I need help to format the book and the cover properly. It will require going onto each page and ensuring things are formatted for printing in a book when loaded to amazon and it's aim is to be hard cover in 8.25" x 11" (20.96 x 27.94 cm)

It shouldn't be a lot of work but there are around 50 pages in total.