I would say surf around on the internet. Get yourself informed. If there is something you can find a lot about on the internet it is al kinds of tutorials (
http://www.w3schools.com/html/default.asp this is the most extensive tutorial on the web I know of), programs, tools etc. for webdesigning. And you can make designing as difficult as you want it to be.
The easiest way is as Misspriss says using WYSIWYGs. You dont need any knowlegde of any webdesigning language. Using them does, altough you can make nice websites, limit your possibilitys
You can also go for it and learn yourself some basic HTML. (good tutorials are all over the web). This is the most used and basic language. With basic HTML knowlegde a bit of understanding of CSS and a simple HTML-editor (also downloadable from the web) you can get quiet far and it gives you a lot more freedom in how to make your site look like. I use Stones WebWriter myself
http://www.snapfiles.com/get/stoneweb.html
From there on you can still just use a lot of already writen stuff from they internet, with its limits or doing it harder by making/writing it yourself and have more freedom in its looks.
The internet is stuffed with backgrounds,buttons,gifs, animations, java-scrips etc. etc. The sky is almost the limm
Other handy tools to have are a good Photo-editor, and a FTP-program to easily load up your site to the internet.