I still maintain a blog on Blogger that I write to on-and-off since 2004 on whatever topic I fancy.
When I launched a new project in 2012, I created a home-grown minimal blog for the project, never again. Main issue being with time requirements grow, you rather focus on developing main components of your project instead of developing features for ancillary blog, maintaining interaction with readers was more important for project than managing spam comments and links.
If I were to create a new blog I most probably will go with self-hosted WordPress. It scales as your requirements grow, lot of support, tools, and plugins. Readers are familiar with, writers are familiar with it, you can also outsource administration cheaply.
In your case, your core focus should be on learning and writing about things you are interested in and not developing and maintaining the infrastructure, software, etc. Consider starting with hosted version Wordpress.com and when your requirements grow out, migrate to self hosted version.