Why not use WordPress? It's simple to install, configure, and deploy. Works on any web host. Internal comments. Auto-updates to keep you running on the latest version if you want.
If you're really interested in /writing/, then just go with one of the hosted solutions such as Wordpress.com, blogger, whatever. It's easy enough to use, requires virtually no set up time to get running, and lets you forget about any techy details.
I know that it's often more fun and more interesting as a hacker-type to think about the optimum way to blog, rather than actually doing it... This is my problem too.
But what you want to establish is the habit of writing. Once you've got that, you can easily port your posts over to another system (and clean up any on the way).
I've recently set up a few Wordpress sites for some people. And much as I despise the insanity underneath, if you're just wanting to write, then it's a very nice platform.
Most blogs die from loneliness- even more never launch because it's so much easier not to write.
It went up to 133 simultaneous visitors and then... poof!
After that I installed a Cache plugin, and since then I've had a couple of articles hitting HN again and going over 200 simultaneous visits with the CPU remaining at low levels. So yeah, Wordpress can scale, with the right plugins :)
Now it lives in a Digital Ocean's $20 VPS, fine tuned to serve WordPress and with W3 Total Cache plugin. Blitz.io tests say it could handle 80 million pages served a day. I know that's not really true, but it handles 60.000-80.000 real visits (more than 100k pages) every month without problems.