What HTML does is
describe to the browser what your Web page should look like. So you have to
figure out what you want your page to look like, and then put that description
into words that the browser can understand, namely HTML.
Once you have your
HTML file (or files - you'll need one for every page on your site) written,
you'll need to get it onto a computer that anyone on the Internet can connect
to. So you have to have access to a server and a way to FTP (file transfer
protocol) your files to that server.
That's about all
there is to it. You make some HTML files on your computer and send them to a
computer that's connected to the Internet. Then everyone can take a look at
your works of art with their Web browsers.