There are many different ways to support your railroad, and they all fall under the general heading of “benchwork.” Benchwork can be just about anything. We’ve heard of one modeler who uses the top of his piano for his railroad so he can enjoy his two favorite activities in the same room. Another fellow we know built his basement-sized railroad empire using supports made of structural steel. He was a metal-framing contractor, and for him steel was the easiest and most natural choice. The materials and techniques are not important as long as your benchwork gets the job done.
For your first benchwork project you may want to try a small plywood table. This will get your trains off the floor and give you a place to add scenery to your model railroad.