For many, perhaps most of us, I think that confusion goes with the territory, regardless of our ages. I suggested Hagerstown for purposes of discussion, nothing more. I am, in fact, interested in the area, and in the railroads that were there, but a lot of thought should go into what to model and how to design the layout.
Some of us seem to need to operate by trial and error, me for one. So, it might be worth thinking about KATO Unitrack, because it is so easy to rearrange it.