Looking for advice on making VFX

I know this question is quite vague, but I want to know any tips on how to make VFX. I am trying to make my own game and in life I am a much more mathematical person so the program is going fine however, I don’t know how to make VFX look good.

I’ve seen tutorials on YouTube which just read of the documentation on what particles, beams, trails do ext. but I was wondering if people had advice on actually making them / how to draw good looking textures for VFX

Any advice would be greatly appreciated!