I'm going to sleep.
Also, you cannot outscan people with millions of dollars at their disposal with the only intent that you cannot make any money yourself from your ideas...
...especially when they are good.
(please disregard the bitter tone.)
An example: rewrite this java code in clojure/scala with lenses. (already done, don't bother...)
People have incredibly short attention spans these days. If your video isn't 20 second shorts with large text and jump cuts you will lose the viewer.
Video is a terrible medium in general.
You're not Tsoding/T3/Primeagen and you're better off spending your time elsewhere. Note-- their audiences are primarily young junior developers or developers to be.
And (not criticism) why is how React works a showcase of your skill?
It really needs someone to give other package managers some love (Homebrew, apt, rpm...)
But I get your point.
Also, a "book on linux" is going to look very different if it's based on Debian as opposed to e.g. NixOS. Linux distros come in all shapes and sizes and no matter what level you're operating on (just using the GUI, light sysadmin, deep systems programming, down to kernel hacking), they may appear as totally different paradigms.
I would recommend simply daily driving Linux. If you're still using another operating system, ween yourself off of that. Additionally, there are a bunch of obvious projects that are low hanging fruit for just getting to grips with Linux. Want a personal website? Spin up a VPS or a cheap laptop and build it from scratch. Set up your own personal email. Get certbot running. Write a simple server in C that can do request/response of TCP. Write an i2c driver for some random micro you have lying around. Whatever you are interested in making/doing, just go do it.
Resist the urge to google everything. `man` has more information than you think it does.
and 2. i think it's gnome devhelp.
there's an app too.
it's too bad distributions themselves promote googling everything.