Huh I saw they were changing it but when I was configuring this system it was still labeled as Sericea on their site, plus I like the name too much to change it.

Thank you!

Waybar is styled using CSS. I just googled CSS character spacing and found this: https://developer.mozilla.org/en-US/docs/Web/CSS/letter-spacing

Let me know if you need any more specific pointers.

You can build your own image easily using uBlue.
You change the system from top to bottom, not bottom to bottom like on traditional distros. Read my post if you want to know more: https://feddit.de/post/8234416

Fedora Sericea contains Waybar by default, as for installing other things you'd want on a system level (not in a container) you use rpm-ostree

Absolutely, it's as close to perfection as I can imagine for a window manager. Can't really think of anything I'd add or change.

Its fedora silverblue, its a imutable file system

Read my post if you want to know more: https://feddit.de/post/8234416

The fedora Silverblue docs explain it decently: https://docs.fedoraproject.org/en-US/fedora-silverblue/

I also plan on writing a blog post with my findings after I've used the OS for a little while.

If you read the readme of my dotfiles you can see the credits section has a link to a Reddit thread where I asked for delp with this topic.