If you just need something basic and don't plan on building more sites, I'd personally just use a site builder like you mentioned. Wordpress is definitely one of the better ones imo.
However, if you plan on building more sites and have an interesting in know web development languages... Brush up on HTML again. It probably hasn't changed too much since the last time you used it. I'd then learn javascript, jQuery, and PHP. Also, from what I've heard, Ruby is a pretty good web development language which is user friendly, relatively speaking. I've only used it a couple of times so I can say whether it is or not but it might be worth looking into.
Here's a pretty good site that teaches you the fundamentals of a few different languages (php, javascript, ruby, python, etc) in an interactive way
http://www.codecademy.com/