I'm still trying to learn Zola well. Do you plan to open-source the website?

If you're talking about the blog, it's an open source Zola theme https://github.com/not-matthias/apollo (the original site https://secret.club which it's based on/inspired by is closed source though)

No, I really need to see how did he structure his website exactly -- to learn how I would do it as well.

I'll take a look at the theme as well, thank you.