Level of detail - and choosing texture size for images.

4k textures  of course is only for things close to the camera.

So level of detail or LOD is an important consideration and really the first stage when taking on any modeling job or designing models.

First thing you ask is will this be in foreground middle ground or back ground

Foreground of course is 4k,  middle and back 2k or even just hd would be enough.

Hi my name is Antonio, and I've created digitaltreats.com as a way for me to organize what I learned with blender.  You might find the website beneficial also. I try to post videos that were full of great tips.

Beginner

 A good description of all the Compositing nodes

This person is able to explain and show how to use the cryptomatte in a very clear way.

How to do claymation in BLender

SouthernShotty on youtube has really embraced the claymation look.

 This is another awesome style Claymation by SouthernShotty

This is always a good feature in your sci fi animations, a HUD.

Beginner

He creates a nice looking motion graphic using simple shapes.

He makes some shapes, and animates them.  Nice design for the HUD.