I love NixOS! Been using it on all my devices since January and probably never going back :)
It all sinply just works™! Don't worry about configuration :) As long as you're not using relatively obscure software, you'll be more than fine reading the docs/manual :)
If you still want to use obsure stuff though, the community on matrix is very active and helpful! Plus most (interesting) projects have at least one or two very dedicated Nix fanatics (/maintainers) willing to help others :D