If you have never been here before: good for you. You won't be missing anything.
In case you came here before: no worries. Everything is right here at your hands.
I just felt like I had to change something.
Here you can just scroll through all the theme previews that are currently listed in the theme index. It's just a few by now, but I am just setting up an automated process to keep the list up to date.
if you remember a zsh theme name, you can quickly enter the name on the search page and will immediately find the preview picture presented on the page. Dead easy
Kind of. You will find additional information about the z shell, themes, installation on various operating systems and the like.