Hkiya.
Chris is the team architect, so I should really let him answer this, but here’s my tuppence hapenny.
Imperial vs. Metric - use what ever you’re comfortable with. Just remember that the scale is 1/56th full size.
Floor height - I’m going to say 6 cm.
Recommendations for scenery inspiration...
Well, that’s a mile wide and an inch long, really. When I’m looking at designs, I try to think about what materials would be readily available, and what would be workable in a practical sense.... so don’t forget the toilet!
Planets in Albedo are supposed to be pretty self sufficient, so a jungle planet might have lots of bamboo and wood, and a water world might have lots of steel and rust on floating buildings. Really your imagination is key here. I’d say pick a planet, name it and get to work! The beauty is that, because the game is so young, you are helping set the standard.
Let us know how you get on, and I do like that building.
Mike