I'm not familiar with a New Home, but what you need is a hole through the top to accomplish your chore. If it has a hole where you want it, all you do is buy the lamp parts and assemble. Most lamps are built around an "all thread" (not sure of that spelling). It's a rod that is threaded all the way down. The wires go up through the rod. The lightbulb part screws onto the all thread and there is usually a nut type arrangement on the bottom that holds it all together.
You'll notice that most of the sewing machine lamps have the rod coming out of an existing hole that is not where you say you want it. Or, it comes up behind it. It's difficult to drill a hole in cast iron. That's what you have to figure out - how to drill that hole. There are some youtube videos on drilling it. Most of those are about drilling a hole in a sink, however. Being a curved surface makes it more difficult.
Good luck.
bkay