Run a few trains and try some shunting, see what you can do with it, making trains and moving goods.
Do you have any room to perhaps run through your fiddle yards into a different section of the layout? This may make it seem as if your train has traveled somewhere.
The scenery additions will make the layout come to life. Could we see a picture of the whole layout as it is currently?
Don't become disheartened...you've put a lot of effort in and maybe you didn't get your expected result with what you have done so far, but a break from a project will often bring new inspiration, and perhaps give you a different perspective on the operations side of it.