Google it before you spend any money. Wordpress is on open source platform, so there are mountains of sites dedicated to it. There are a few different approaches to what you can do with it, depending on whether you are building a .com blog or using it as a CMS. As a blog, it is straightforward HTML and CSS editting within there frame work. As a CMS, it is a lot more complicated and I would say there are better CMS platforms out there.