Mr. Strogey:
Don't be intimidated by what you see on here...buy a structure kit in styrene and
another in wood, and you will find that anybody can glue little sticks together. An
eye for detail, and I DON'T spend that time to try to build contest quality models, trying to populate a layout, time, and patience, is all it takes. I got my practice at an early age by kitbashing a tin Marx #21 into a double cab/ended version of a New Jersey commuter diesel because the #21 was too big for the sharp curves on my 0-27 track.
(that effort, with tin snips and then brush painted, did not enhance that engine's collectibility!)
Then, probably early teens, I bought an HO flatcar kit, and then some wooden building kits. And realized, "I can do this". And you and everyone else reading this
can, too,.... some can do it better, but your effort will be unique. If all those kids were building models in the '50's, no reason adults can't do it today, and have something tangible to show for it. As for sources of ideas, OGR and all the other model railroad magazines, photos of structures you like, drives searching out railroads, all work well.