Because with Blogger I would have had to “upgrade”, I tried WordPress instead. I thought I could import posts from my previous blog, but it looks like the process needs me to…upgrade.
Howdy! This importer allows you to import posts and comments from your Blogger account into your WordPress blog.
To use this importer, you must have a Google account, an upgraded (New, was Beta) blog, and it must be on blogspot or a custom domain (not FTP).