I found a picom shader that has a bunch of features for having that old CRT effect.
https://github.com/ikz87/picom-shaders
I don't know how you set it up but if I figure out how to set it up then I'll let you know.
There's also CRT effects for hyprland.
https://github.com/hyprland-community/awesome-hyprland/issues/22
I've never used hyprland. Also make sure to open images in new tab if you want to see the effects cause the compression on github will sorta remove the effect. I hope you enjoy using Linux, it's pretty cool if you can get over all this stuff.