Wordpess is ok but I think it might be overkill for a simple blog.
You also have to put a bit of extra work into securing it as the default installation leaves your site vulnerable.
Having said that the online community is huge and there's plenty of documentation and tutorials available to you. It's also a pretty straight forward admin interface.
I'd shop around though and see what's out there.
One of the newer ones I quite like for its simplicity and features is PyroCms
. It's built on the Codeigniter framework, which is my preferred framework when I'm developing new applications for my clients.