Does anyone in here have experience with exporting MOCs to Sketchfab?

I'm pretty excited about how well LEGO spaceship MOCs render via Mecabrick render farm/blender, because the POV-ray renderings looked awful back in the naughts (unless you spend more time playing round with POV-ray settings than building with LEGO).

An old dream of mine is to upload rendered 3D models to Sketchfab, so I can include them on my webpage via plugin and annotations.
Today I tried to export an old MOC via collada file to Sketchfab, but the result looks more like an old LDView file: https://sketchfab.com/3d-models/17-discnose-b02e4654677a4d5d9fcae16cf7ce47bf

So the file clearly needs to go through Blender with Scrubs awesome Blender Advanced package.

However, I'm unsure of the work process from there:
Apparently, you can import blender files to Sketchfab, so will they render the MOC in 3D if I set up the lighting, materials and other stuff in Blender?
Or do I need to render the 3D file myself (and would that even be realistic on an old ultrabook)?

I'd also like to add starfield backgrounds to my spaceships, engine glare/contrails and perhaps animations with weapons firing.

Any thoughts or suggestions? 😃