Welcome aboard, Joel. Once you get into the swing of things, you'll be in for a treat. The virtual railroading hobby has a lot of the same things that the real one does, and when working with space restrictions of the virtual modeling world, you can bring your own N-scale creations to life and then some.
My recommendation is to check out the pre-built routes and see how they're constructed. You can open them up in the Session Editor, and then poke around. Play with the little driving sessions and get to know the routes that way as well. There's a tutorial on driving, which I think you should look at as well.
After you've checked out the built-in stuff, check on the Download Station, the DLS for short, for a route that someone has created. Look for those by user Philskene (Phil Skene). He created a couple of the routes in TMZ2017 and his others are just as spectacular. I particularly enjoy his narrow gauge routes. With these routes, from the DLS, you can open them up and edit them in Surveyor, and pull them apart if you wish.
Then after you've poked around here, try something on your own where you'll be addicted instantly. What is great about the Surveyor part of the package is your world is yours. You start with a simple baseboard a 720 x 720 meters. Three of these boards linked together is equal to 1.3 miles. You can sculpt the landscape, texture it, place objects, and fiddle with this world endlessly without worrying about ruining anything. I too would cringe when I made adjustments to my own real N-scale layout. Putting in a switch, or painting an area would create a plaster mess, and in some cases things wouldn't go as planned and would have to redo whole sections. With the virtual world, there's none of that worry. Don't like what you're doing? Close the route and start up again. Make a mistake? Click the Undo arrow and fix the mistake.
Anyway The process I outlined above is pretty much what I did 14 years ago when I got the TRS2004 program from CompUSA back in December 2003, and I've remained addicted since!
As always, if at any time you need help, ask here and don't be afraid to ask. This is as you've found out an international community and there's always someone around that can assist you.