If I remember corretly, you said that, before publishing the book, you bought an ISBN number. Is there something else you have to do before publishing it? Like a trademark or something like that?
No, all you have to get is an ISBN number. It’s used for libraries and other universal book indexes to know your book exists. You also need a different one for every format of the book (e-book; paperback; hardcover)
The ISBN for my book’s e-book version is
0998332798. The paperback’s is
I guess you do need a cover of some kind. Either hire someone to draw it, draw it yourself, or buy a stock photo or something.
Other than that, it’s highly advised to get a professional editor. But that’s technically optional.