anyone know of any good NixOS tutorials/guides?

hello! i've been starting to mess around with nixos; i know how to do a few things in it, but i still feel like there's a lot i still need to learn. ive read the manual and ive looked around for a few video guides but found that they weren't as comprehensive as i was looking for.does anyone know of some good guides or resources to learn from?

I am using nixos for more than a month now and i have to say it was the most stable experience i have ever had with a distro though there are some caveats as setting up a programming env here is a bit of a hassel if you want to get started this is the best manual i found btw its using experimental feature like flakes but dont worry its pretty stable imo 
Link: https://nixos-and-flakes.thiscute.world/