Oh my, part of why nix is so hard to learn is because information is scattered all over the place… it’s a pretty "decentralized" distribution.
I’d maybe start here: https://nixos.org/manual/nix/stable/
Discussion
also… https://nix.dev
my favorite telegram group https://t.me/nix_org
somebody just suggested me https://nixos-and-flakes.thiscute.world
this video is a bit long, but it definitely convinced me to make the switch to nixos https://youtu.be/6Le0IbPRzOE
saved for my future, for everyones.