Unreal 4 Lighting Academy....or something like that ;)

Hey Tilman (Wisam here), a question for a complete amateur when it comes down to lighting.
Where do one start?
for ex. if i block out my scene in UE4, i also would love to start with a block out light.
But, which actors do one use? Directional light for the sun, Skylight makes shadowed areas lighter? Using Lightmass direct or after i start to UVW things? Is Lightmass only worth it when using static light?

the reason for my questions is because i’m in the “Ancient” competition over att Artstation, tomorrow i’m starting my blockout, but i’d love to have a blockout light at that. Is it to early to think about it?

Thank you! And love your videos!