yeah thats the best thing you can start with... start with a cube
thats one I've done in 10minute just to show you what you can do with a box
and im just starting so I know you can do something like that too or better
just start with a square with 4X4X4
and add some line when you need it
extrude will help you too
I hope it will help you
have a nice day and good luck with your house
Maya modeler - current project Avatar - purplemikey