Well then, my recommendation stands. Learn some coding before making entire games.
Anyway, to do what you want, you’ll probably want to use factories. An ActorFactory (as it was called in UE3, not really sure what they call them now) is an actor which has the job of spawning another actor(s) at runtime. You create lots of these all around the level, then tell some of them to spawn their actors (doors, for example). You can then use a random generator to determine whether the door opens into a room or a hallway. What you’d need most of all is a data structure to hold all this information within, and creating that won’t be an easy task, as it will depend on how exactly you setup your level and generation mechanisms. I’ll make some simple blueprints and post them here in a short time.