NixOS is an OS that uses code written in the nix language to configure the system. You can always ask here for help if you’re stuck, but if you’re unwilling or unable to learn, NixOS is not the distro to use. You don’t necessarily need prerequisite knowledge, but you need some perseverance in that case, and it’s hard for strangers to tell you whether it’s worth it for you.
But step 1 is: forget the wiki, just ask here if you need help. That probably is the source of frustration.
And keep another system that’s not NixOS around, so that you don’t feel pressure to learn quickly. NixOS forces you to become a packager, sysadmin, and sometimes developer to get going - that’s a massive learning curve for sure.