Create a site, name the site, find a URL, and manage the share settings to add collaborators and make your site public.

Create a new page and add various types of content to the page.

After you created your site, you need to make some decisions about the formatting of each page, where the site navigation goes, a header, footer, etc.  

To ensure that you have shared all embedded documents, and that your viewers can see/access everything on your site, it is important to preview your site.