The first step should be setting up your ambient lighting, whatever scene you're working from, remove all lighting and fog until your screen is completely black. From here we can set up the ambient lighting, which basically means making your scene legible even without the addition of the directional light. For a lot of things I'm going to go through there's a tonne of great resources, but the most useful one I've come across is this Miro board by Elliott McSherry. If you aren't using World...

A collection of vaguely useful things to know. A list of shading models from least to most expensive: Unlit Default Lit Preintegrated...

Why is Unreal STILL compiling ?