I have installed and tested hundreds of different popular scripts. When it comes to blogging nothing compares to Word Press. It is easy to set up an easy to get going.

It can even function as a general content script.

If you already have an existing site you might just want to set up a subdomain for the blog, maybe blog.yoursite.com and installe Wordpress there. You will literally be able to have an active blog in less than 10 minutes, less than 3 minutes if your hosting provider has it ready to be installed.