The language is alright, the documentation and rate at which things change is the issue. You wanted to do something and found a page about how to do it? Cool,

The language is alright, the documentation and rate at which things change is the issue. You wanted to do something and found a page about how to do it? Cool, good chance it won't work anymore cause it changed. If you do get an error from nixos-rebuild because of your nix files, the error report will probably not be useful either.