Xorg is a display server for Linux ecosystem. Every ecosystem has a display server. It is what makes it possible for you to have graphical applications with movable windows that can talk to each other, or have a mouse cursor that can click on things.

Wayland is a replacement for Xorg because Xorg is old and its developers said an alternative is needed. Wayland has differences that I won't discuss here, but I'll be happy to do so if you ask.

Hyprland is a wayland compositor. A compositor is basically an implementation of wayland (there are many) and gives you a windowing system that you can run graphical applications through. It is usually a lot more minimal than having a full graphical desktop like KDE or Gnome.

Hyprland belongs to a class of comositors called "tiling", which forces windows to be in a tiling formation. In other words, windows do not overlap or stack on top of each other. Hyprland stands out in having a lot of eye candy and visual effects.

I use CLI for moving files, etc. After you use it for a while, you find out it can be more efficient, faster, and more pleasant to work with.