how to make visual effects for ue4 games ?

so i want to learn visual effects or however they r called , and i searched over and over and there seem to be no tutorials out there not even paid ones , so how or where to learn that ?

There is some stuff out there:

But! We’re getting Niagara (early access, most likely) in 4.20 (any day now) so there will be new and modern ways of creating sfx.

Programmable VFX with Unreal Engine’s Niagara | GDC 2018 | Unreal Engine