For me, I really want to get into niri, but the lack of XWayland support scares me (I know there’s solutions, but I don’t understand them yet).
Also, I stopped using Emacs (even though I love its design and philosophy with my whole heart) because it’s very slow, even as a daemon.
Nginx. I’m going to learn soon but I’m still new and it seems easy to screw up exposing things to the Internet.
If you have to learn from scratch anyway I would consider caddy and traefik. I think those might be a bit more modern and user-friendly than nginx.