I’ve just gotten started, except that I cannot! I tried to File>Open a previous HTML document that I created in Dreamweaver, and it will not open. It’s shaded out in the Finder.
Freeway can (and I mean that with the most extreme loosely-ness) import an existing HTML document by first creating a new document and then going to File and choosing Import HTML.
Chances are it will have no resemblance to your Dreamweaver design, but it will give you a start.