NetBSD is IMHO the most beginner friendly nix out there. It's small, lean, and well documented. You could know almost nothing about nix, read their handbook, and come the other side half competent. Linux (my daily driver) by comparison is a constantly moving target with no single source for coherent documentation and where anything goes. FreeBSD is better, but when I last used the handbook it had plenty of outdated chapters, and it seemed like everything had so many different ways of doing things. NetBSD had small elegant solutions, and recompiling your entire system from scratch was a pleasant experience that didn't have me trapped in dependency hell or even needing to consult documentation after I got started.

Currently seeing an influx of interest from new people who want an OS with strong anti-ai stances.

Beginners to NetBSD who are not vi users.

You can ask Claude to cross-complie, prepare an image (aka install) and run an emulator. I tried exactly this yesterday and in about an hour I could attach to tmux and run tests on emulated riscv64 board.