I would follow a few of the silo basic box modelling tutorials, and try to create initially just one prop to use in your scene, A nice moulding would be a good starter project and needs very basic skills to undertake, but don't underestimate a simple model. It's textures will only be as good as the UV map attached to it, sometimes a PIG to get right on a simple prop. Build your room one piece at a time, be happy with each bit before moving on to the next and you will pick it up in no time.  My tuppence worth.......