Nobody starts as an expert or "pro" at this. The mantra has to always be, "Do better than the last time".
Jim, you are doing terrific modeling. Rest assured.
This was my first fledgling attempt at an N Scale layout, circa 1987:
An interesting thing about this layout, crude as it is, is that the wooden water tower, little wooden station (center-left, in front of the water tower) and the unfinished blue house on the hill (a "Sears Home" built from plans in RMC), which were all crude attempts in this photo,
followed me from layout to layout, got steadily reworked, and eventually became 3 of the structures I used to earn my NMRA "Structures" certificate. "Do better than the last time" ! Now they are on my current layout as a record of my life in model railroading.
That Concor Hudson was the first decent engine I bought, and I still have it.