Inspiration

Beginner

Chong made a superb Tutorial in which he makes and animates a Sci Fi Corridor.  He models all the parts needed, (He uses a Boolean approach.)  An important tip is how he keeps the models to 1 meter, and sets the origin points to the lower right of the models so he can tile them later in geometry nodes.

Cables are easy in 2.93 version of blender.

Inspiration

Beginner

This is great.  Cables seem very easy now in blender. Oct 2021a

How to make Crystals

Inspiration

If you take a little bit from each tutorial, like the driver part from the first one, the texture the intermediate one, and the volume absorbtion from the last one.  You should have a very good looking crystal.

Idea for the shot:

So, thinking about that shot, need some asteroids, debris, a broken ship, more debris, a salvage ship, an astronaut with a spot light,  and something that tells what happened to the derelict

Elements needed:  Debris, asteroids, broken ship, salvage ship, astronaut

Tutorials used:

Make the ship

Inspiration

Looks great, great colors, composition, and overall anime feel. Inspirational.

Beginner

Chris has put out quite a few tutorials that are easy to follow.  

This is a tutorial from 2.7, but the ideas should work with shaders in 2.9.  Very nice style