I think the best thing is to just start. As you're not blogging, there is no one that knows what you need, you probably don't even know. But after you have started with whatever is easiest right now you might discover the things that you want from your blogging tool. Maybe you're happy, maybe you'll play around a bit.

One very important thing for me is to stop the tool from distracting myself from writing. I write simple markdown files that I then publish, there is nothing that I need to do that distracts me from writing (I still get distracted, but at least not by my blog). The writing is the main task, the publishing and everything around is tiny, so I can focus on what I want to do with my blog. Write.

(Just to get back to the point, choose whatever is easy to set up and easy to maintain and if you realize that the tool is not right for you just change it. (This of course works best when you use your own domain))

Thanks for the advice! You are probably right.