Truthfully, that’s the best thing to do. You don’t need a bunch of people guessing as to what you have and how to put it together–the fun of the hobby is playing around and experimenting. Start putting pieces together and see where it takes you.
I am with Kevin on this one, whatever youy like ; just sit down on your bum and and play around with different configurations; you may get one you like pretty quickly or you may never aattain what is in your mind.
What you have is pretty good to start but will only have a limited amount of interst for a limited amount of time, so be prepared to expand pretty quickly.
Solid advise there. I would highly recommend not planning anything out on paper, have a thought as to what you would kind of want and then lay it out and try it. Long story short, go play with the trains, they will tell you what to do.