Layout problems

You may want to invest in more tracks; a quick search on eBay will find you lots for a not bad price. Try to also find siding and switch possibilities in addition to using risers. It would probably be better to use the risers that allow for another train to pass under given your situation in lieu of the risers that look like squished frustums (pretty bad way of describing them)

Here are pictures instead.

These:



Instead of these:



And if it's still tough to make space for a layout that feels substantial enough, maybe check out Plarail Advance? These are just suggestions but I hope you figure out what you can do for your layout.