[PyGame] How do I make an advanced shader

[Rabbyte]

I have been using pygame a couple months now and have been using it to recreate the terminal interface from the fallout universe (with a few tweaks to make it fully functional) I am focusing on the visual aspects at the moment and I would like to develop a shader to apply various CRT effects such as scanlines, phosphor bloom, etc but I have only ever done a basic shader to make a simple rotating cube. I found a possible starting point through THIS POST but I wouldn't know where to start. I guess i'm looking for some guidance on how I'd go about implementing a shader like this into my Pygame project as well as how to learn to make other shader effects like visual glitching.

For anyone who is interested in my project I'll toss a video in a spoiler

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