How to get to HACS store?

I am new to HA and I am not a programmer. I have installed HACS on my Linux VM running Docker. When I go to the HACS tab in the left menu, all I see is repositories. So I installed a repository to get a theme. The themes folder is in my config with the repository I installed. The theme install instructions say to go to the HACS and search “Blue Night” and click install. Nothing other than repositories shows up when I go to the HACS menu. Am I missing something? How do I get to the actual store?