Blogger, and register as a user. If you have a Google account of sorts (GMail, etc) then you will be able to register using your google account. Once you have set up your account and have sorted out your template, you will be able to publish your blog posts using email. Therefore, if you know how to email someone, you can become a blogger.
Before you sign up, you can first see how things are done at the the Blogger site. Here are some links to assist you:
- Take a quick tour
- Watch this video tutorial
Twitter and your Facebook page as updates. But, I guess that is a post for another time.
If you want to know more, leave a question in the comments section. If I don't know something, we could always get the answer from the web!