Please post your SCARM file so those of us who also use SCARM can make changes and show suggestions vs trying to explain them in writing.
Where are the 3 walls? Top, left and right? Top, left and bottom? I don’t see any place where it will be easy to add a lift section for entry.
Based on your description, I assume the inside oval with the reversing loop is your top level and the rest is your main level. If it is, that’s not the way it’s usually done. Usually, those tracks would run directly above the lower level otherwise they’ll obstruct the view of the tracks/scenery below. Also, with a single reversing loop, once you reverse a train, the only way to reverse back is to back through the loop. It’s also hard to see how you plan to landscape the spurs in the top level. If you intend to add decking for buildings, etc., that further hides the main level and minimizes access.
I don’t see where/how you plan to access the lower staging level and where those tracks will be.
There are several spurs in the top and bottom left that don’t have room for much in the way of landscaping, so it’s hard to tell what they are for.
