Write a wayland compositor

Honestly, this one's kinda hard to get with a good integration with systemd going. It's a complicated spec, and niri and cosmic have already done a really good job at it.

Implement an Xscreensaver equivalent for wayland, in rust

This should be fairly straightforward. ext-session-lock-v1 already takes care of most of the security features that xscreensaver implements. All that's needed is a UI toolkit and the ability to load gifs. awww, the wallpaper daemon should have the code for loading gifs and caching them into memory. gtklock should already contain the code to launch the gtk dialog box and such. There is a POC gtk4 port as well, and I'd likely base it off of that and allow folks to load gifs. And that should be done. However, it'd be in C, so a rust port would also be needed.

Create your own OS

Should be doable in the long run? Atleast qemu emulation and init to sh shouldn't be impossible.

Contribute to jellyfin and allow it to stream media, particularly books

This is especially annoying as I have to load the entire book every single time or I have to download it to the local device.

Create a package manager that can be used akin to nix, but easier

supac is already a thing, and is pretty usable too! Check it out!