After creating HTML, how to use our web page design as a real website page?

Answer 1

When you create a Webpage, that is a Real webpage.

Answer 2

your question isnt clear. if you mean how to view the page save your file with a .html extension.
if you mean how to publish it on the net you need a server to host your page,for a fee, of course, then you can view it on the internet.