First step is to choose a ready-made template available on Hosted gallery.
As you may notice, the Editor's windows are a bit different.
Yes the Preview window and the Editor's right sidebar with options are the same but if you scroll down, you'll see the Page Settings with all available tabs and options
General tab shows a set of boxes you can populate.
Title - this will be the title of your page so choose it carefully and avoid typing poems... keep it simple.
Description - another SEO helper. Type a short description of the page you've already created
Keywords