We all start somewhere, I'd say a room is probably too big a project for most beginners. Start with something simple. Find a simple prop to model. A fire hydrant is usually a good starting point.
Hi, I'm not quite sure what you were trying to do with all of the curves but as someone who has used Maya for 6+ years I would say that this is not a good way to learn the program or start with any 3d modelling/animation. There are a lot of things you can do with the program but its important not to get lost in the sauce!…
I think you'd have less headaches using the curves as a proxy model (position/placement/scale), assign to a new layer..make layer a reference layer, and then do box polygonal modeling on top. I'd watch some flipped normals tutorials on hard surface modeling to get you started. Good luck.