Help Please.

Hello my name is ChristianGM96, I am currently trying to create a ship based infection map. I am not copying what the UNSC ships already look like, I am in sense creating my own (with a bit of design help from those ships). The reason I am doing this is to test, if enough people like an infection map like this, if it is a success then I will try to make the next infection map as close as a UNSC ship as possible. I am interested if any of you would be interested in helping me. It would be much appreciated, most of the parts I get stuck on are creating rooms, walkways, etc… and finding what to put inside large enough rooms. Thank you for your time, if you would like to know anything else about this please ask :).