Here are some very beginner attempts at 3D art I made for a personal sci-fi worldbuilding project. I knew absolutely nothing about 3D art (art in general, really) until January of last year when I downloaded Blender on a lark and started poking around. Why not? It's free. Texturing and shading is proving quite daunting, so I've been sticking with a more primitive style. Kinda reminds me of the show ReBoot.
A star hearth (ceremonial fusion reactor)
And another one.
Spaceship (Modeled in Plasticity but textured in Blender)
The planet Yih. It's kinda like Earth, 'cept it has a ring.
Wind fruit. It auto-ferments in your gut and makes you drunk.
Raw tailstone crystals, used for FTL communication
I like that you've shared these with us. The textures are a little odd, they don't seem to wrap properly around edges, but I've always struggled with that as well.
Check these out:
What do you think? I've also got a fast food restaurant I was modelling a while back.