Completely Befuddled

I mean I am lost here. So here is the scenario; I have a website, built it in Dreamweaver and used the design tools, I know very little code.

Decided I wanted to use a nice WP template which would display my artwork nicely and conform to portable devices…

OK so I start on this new course of operations, my control panel has a quick wordpress install and that is easy, so I install it. I see a dashboard, just like I am supposed to, BUT BUT I haven’t taken my other site off the server, and I don’t yet have the new template purchased or loaded with text and images. HOW DO I DO THIS NOW?? And what does the public see? It looks like my regular site is still up and running, thank the gods, but how do I upload the new site when I have it just so??