Copyright pages typically go at the very beginning of any book, behind the inside title page.
I wrote my very first copyright page today and looked at several other books to get an idea of what information is included on these page.
Life lesson 101: learn from others. I literally opened up 10 books from similar genres and read their copyright pages. This gave me a good idea of the terminology I needed to use when writing my copyright page and the information I needed (like publication year, publisher name, and ISBN numbers). Remember that this copyright page does not prove you have an official copyright, but it acts as a friendly reminder to the public that your content belongs to you and should not be plagiarized.