https://blendos.co/blog/2024/06/05/blendos-v4-released-arch-linux-made-immutable-declarative-and-atomic/
Arch Linux made declarative, immutable and atomic.
Welcome to the Linux community. :)
You will probably never understand everything about Linux and all of its included and associated systems. That's completely fine, no one does! That's why we are many, and it's what asking for advice or help is for. You can just learn whatever interests you at your own pace, and know that there will always be interesting things you haven't seen yet.