Download and install Sigil. It is a free, professional, cross-platform ebook editor. (Read this article for your first steps.)
Open your book with Sigil.
Locate your title page or the first page of your book.
Type in your copyright information. Read this article for adding copyright information.
Click where you would like to insert a page break. We recommend that the copyright notice starts on a separate page. Then go to Insert and select Split marker.
Whatever is after your cursor, will be moved to an empty page. Just press Save and upload your book again.