What I do is add two static pages: “Copyright” and “Privacy Notice”. I populate both those pages with standard language.
Then I copy “footer.php” from the “wp-content/themes/expound/” folder to my “wp-content/themes/expound-child” and edit that file to add links to the “Privacy Notice” and “Copyright” pages. You can do this in the Dashboard (Appearances => Editor) if you set your file permissions correctly ( Don’t forget to reset them afterwards! )
Once that’s working, you can edit the CSS for presentation, again in your child-theme folder.
Here’s an example: https://www.castjames.com