Not Fedora, but MX Linux and Antix are good for persistent installation on usb-sticks. See here: https://antixlinux.com/the-most-extensive-live-usb-on-the-planet/

Some people use carbon foil for cars to customize their thinkpads.
see here: https://thinkwiki.de/Geh%C3%A4useteile_mit_Schutzfolie_versehen

not sure about the other ones, but "madaidan" (Kicksecure/Linux Hardening Guide) and Daniel Micay (Copperhead/GrapheneOS) are well known security researchers. See Daniel Micays take on Systemd:
https://old.reddit.com/r/GrapheneOS/comments/bddq5u/os_security_ios_vs_grapheneos_vs_stock_android/ekzo6c0/
https://forums.whonix.org/t/fixing-the-desktop-linux-security-model/9172/2

Suckless.org's take on systemd is pretty well researched. All sources inside.

Some other critics are Ted Tso, Torvalds, Volkerding (Slackware), ... See https://en.wikipedia.org/wiki/Systemd#Reception
https://www.zdnet.com/article/linus-torvalds-and-others-on-linuxs-systemd/

Use some kind of hierarchical folder-structure like the Usenet does.
Something like: unix.desktop.theming for all your desktop ricing/theming stuff, unix.lx.debian.doc for debian documentation, win.win10.winget for everything related to winget on windows 10, rl.bureau.finances for your finances, accounting, etc. ...

You can use the Browser Extension "QuickCut" to save your bookmarks in folders. Its really helpful when you work on a bigger project and have all the documentation weblinks at hand.

Never tried it but there is Franz and certain plugins for Bitlbee and Pidgin Messenger

youtube-local or yt-local with vpn. its very easy to set up

How to get this font on linux?

Maybe try out MX Linux. It has a bunch of GUI Tools preinstalled. With MX Installer you can install Brave and even Flatpaks.
See here: https://www.youtube.com/watch?v=aESEb8lTvz4&t=1014s

https://i.imgur.com/AdP6fvK.png
On my KDE Desktop (OpenSuse) the Clipboard icon looks like this. The WhatsApp Icon opens a Browser with Whatsapp?

Any distro is good for privacy. Try out OpenSuse Leap or MX Linux with KDE to get a windows-like experience