Eh. I mean it's certainly a smaller curve than other "hard" distros like Arch or Gentoo, and there really isn't one at all since the installer does most of the complicated stuff for you.
Would I recommend it to beginners? Probably not as they wouldn't be willing to do any reading, configuring, or time sinking at all.
However, for this use case of building solutions by an experienced Linux user, the 30 min to an hour of learning is really not a lot when it would save a ton of time down the line. It's not like you need to be a nix lang or nixos expert to use it effectively