Your HTML pages are now on the real, live interenet!
Visit the W3C Markup Validator and check for errors in your HTML. You can see how valid your HTML is by entering the URL of your page into the "Validate by URL" address box. The validator will tell you if you have errors in your markup. (For example, if you left off the document head section, or if you have nesting or parent/child errors.)
Visit head.html for more information on the head section of your file.
You will continue working with your pages, adding lists, tables, media elements, and eventually styles. All of this will be good fodder for your portfolios.