Follow the steps in this blog article to learn how to setup a knowledge base with Refined. Otherwise this video covers how to build a knowledge base solution with Refined for Confluence Cloud.
Related Videos:
How to Theme Refined for Jira and Confluence Sites: https://youtu.be/EVSfyhJllhg
How to Add a Confluence Space to Your Refined for Jira Support Site: https://youtu.be/Esu5uToM0v8