Fair enough. But still, you want to build a layout you can grow into.
I am assuming you have read my Beginner's Guide clickable from my signature. I have been thinking about writing a sequel about designing a 4 x 8 HO layout, but an N-scale door kinda sorta fits.
Your layout can go in circles as a necessity, but you want to start thinking of your
railroad as a business that you are modeling a small portion of.
Think of it this way. If you have a board on legs in which your train goes around and you watch from above, it sort of like a ride at Disneyland--you have a toy train.
If however your train is a section of railroad from Spokane to Portland that specializes in lumber in the the 1920's then you can set up a commerce, that logically delivers and picks up cargo in a way that makes sense.
In the first case, in which you watch your trains run laps, you will probably outgrow your layout before you get to the scenery stage.
But if you think it through, maybe do a little research, you can build a model of a railroad. Things go from place to place and you deliver them. Instead of have tracks where your trains can go, you have industries to service and you build tracks to take care of those industries.
Build the logic, then create the system to take care of the logic. Your thinking should go as follows:
Pick a road name you wish to model.
Pick a location and era. This two are co-dependent and does not matter which comes first.
But these two determine your scenery and industries. And these two must be considered early. One of the biggest rookie mistake is to lay track start running then try to fit scenery and industries in after the fact. You end up with a permanent Plywood Central railroad.
Your choice of industries is limited by available models and/or your ability to scratch build.
Available models address the track in certain way and you must provide track to get to your industry models.
Your industry models need roads for shipping by truck and for the employees to get to work. All this must be worked out or you end up with a half ass toy train layout or you see your mistake and rip everything out and start over.
Here's the layout I am working on now. Notice that the roads and buildings are identified and laid out.
I sorta cheated in that I copied the railroad in the town I am living in back in 1950.
Goods come in from the left and are delivered to the various industries by a dedicated switcher. It is something I can use to run trains on while I am building a larger layout. I plan to work on it slowly and scratch build the buildings from old photos if I can find them.
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Here's is my first layout, and to be honest I was extremely lucky. I built it my way as something for my kids and then converted it to a layout for me. Luckily, I had design help and listened to the people who knew and I got a decent layout in spite of my stubbornness. I accidentally could work scenery and a layout into my plan.
The HO 4 x 8 plan.
This started out as Hogwart's layout for the kids, but after a month it got to this point and the kids were bored. I converted it to an 1885 layout set in Central California between the fictional towns of Rock Ridge and Train City.
Luckily, I was able to create a scenic divide between the two towns so that the layout had the illusion of going from here to there. While you were working the mine in Rock Ridge, Train City seemed like a town in the distant valley and while working Train City, Rock Ridge was in the highland forests. I created this illusion using a tree line and change colors of the ground and even the ballast on the tracks.
Rock Ridge from Train City
Train City from Rock Ridge
I eventually added staging to give it even more of a feel of being in a railroad system. The fact is, the smaller the layout, the more you need staging.
See my article:
What is Staging and Why do I Need it?
I told you all that to tell you this: Think in terms of creating two scenes. Your train then will travel through the scenses and maybe stop to work.
Anyway, this should give you a whole crap load to think about.