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.