I know a few people who use word press for this. https://wordpress.com/learn-more/?v=blog
It appears to be as simple as create a log in and start Blogging. There is also an App to download if you use your phone a lot.
Alternatively, you could just use Facebook, with the privacy on the posts set to 'public'.
Word press will also share the links to your blog to your FB, if you wish.
I have used Wordpress and Blogger.
Blogger is probably slightly easier to use, but for some reason it doesn't agree with my iPad and I have trouble seeing what I've typed when the post gets so long.