[Stiglr]

I'd change one thing:

When you select the vertices for your cockpit aperture, I'd do this instead, to make my cockpit task even easier:

2a: Combine all those surfaces into one face.
2b: Indent it just a smidge, say 0.005 meters or so.
2c: Extrude the whole indented surface down into the ship and get the walls and the floor "for free". You can stretch or deform the interior walls by sizing and moving the corner vertices to get more or less detail as you wish.

Then continue adding interior details.