If you’re not ready to tackle learning wordpress you might want to check out Tumblr http://www.tumblr.com/
Tumblr is the easiest micro blogging platform in the world and can be installed on a subdomain of your website (http://blog.yourdomain.com). After your site is live sign up for tumbler and tell us where you want it installed (example: blog.mydomain.com). Then on your tumblr blog click customize, then info, then check “Use a custom domain name”. Give it the same name you told us (example: blog.mydomain.com). Done!