It's not exactly a writeup or review, but Ian Henry's blog series How to Learn Nix captures the surprises, good and bad, that a newbie exploring Nix is likely to encounter.
Some of the problems he encounters may be outdated, as Nix and its documentation have both evolved since the start of the series. His experience is also somewhat shaped by his decision to rely solely on the documentation and the software itself for guidance, which he held to for quite a long time-- if you seek help from others earlier on you may get stumped less often. But overall it captures very well what getting to know Nix and its docs is like, including the emotional reactions to sharp edges.
Some of the problems he encounters may be outdated, as Nix and its documentation have both evolved since the start of the series. His experience is also somewhat shaped by his decision to rely solely on the documentation and the software itself for guidance, which he held to for quite a long time-- if you seek help from others earlier on you may get stumped less often. But overall it captures very well what getting to know Nix and its docs is like, including the emotional reactions to sharp edges.
https://ianthehenry.com/posts/how-to-learn-nix/