I'm actually in the same position here myself, I have a wordpress account but the interface is so complex I am not sure how to start creating something, much less something that would be appealing to people not using screen reading  indeed I primarily just made the account to leave comments on other people's blogs.

I have contributed articles to other sites such as www.fantasybookreview.co.uk who post up my book reviews and have now also restarted their blog and are doing articles, but starting something of my own would be nice too.

I'd recommend Google blogger, it is much more blind friendly than Wordpress blog these days. If you use wordpress for the content management system, it's good. But if you're looking to blog with wordpress, as I said, I would recommend blogger instead.

Hi!
I am blogging with Wordpress.com for five years. Ofcourse, devs can make sometimes some things unnaccessible, after some months back accessible, but It's OK for me.
It uses Wordpress.org platform, but It is littlebid commercial.
But, there are little issues with languages. For example in WP reader, if You speak Slovak, You'll haveto switch interface language not to Slovak, but to Czech, because of mutual inteligibility.
This issue is ofcourse, very strange, but currently I haven't any big problems with Wordpress.com.
I have tested also Blogspot (Blogger), but It seens so different for me. It is also accessible, but with complexity. My experience is, that Wordpress.com is accessible, like Tumblr and sometimes Blogspot.
Ofcourse, You can for example turn off infinite scroll, because this function isn't very good for example in Firefox. I would like to help You, if You want, but I have also some duties. I'll try It best, as I can.