One of the biggest mistakes you can make in this hobby as a newbie (or a returnie) is to attempt a layout far beyond the scope of your current skills and knowledge. I’ve seen more grandeous layouts started, then abandoned, by beginners than I’d care to count.
Start with something managable in size to practice or reestablish your modeling skills on. It’s also quite easy to design a simple trackplan that can be expanded later on to much larger dimensions if you are pleased with your initial results.
CNJ831