I might also add that, rather than wasting your time with IIS, you could download and use Apache which is the web server most folks use. It is free and easy to set up.
If you want to be a web designer, learn HTML (code it yourself to start rather than using a WYSIWYG editor like Dreamweaver). Then plunge into the graphics packages paying particular attention to the file sizes of the web graphics you are producing. Remember, the web is its own media and operate within the constraints of that media rather than railing against them.
If you want to be a developer, again, figure out HTML first. Then you'll want to become familiar with javascript, which is a client-side scripting language. After that you'll want to acqure knowledge about a server-side scripting language - PHP is a good choice for a newbie. Then you'll want to start mucking around with Data Bases (MySQL is a good free DB to start with). If you take the time to follow this path you'll discover that coupling a server-side scripting language with a DB will unleash the true power of web technology. Pays better too. ;-)
Whichever route you take. Good luck.