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

Beginner

Intermediate

 Time lapse where he is able to build the droid from a blueprint image.  He textures the droid also.