Hugo Theme Update

I would like to update this theme in Hugo to make a website look like the one below. The homepage would list all folders in the parent directory under content and then click into the subdirectories showing the md files of each respective category. It’s a very well done website and I’m having a hard time making the theme work exactly as they have it. I believe the theme is out-dated and needs to be update.

Here is the theme I want to implement:
https://shock.aao.fyi

Website I want to mimic:
https://aao.fyi