I did this at the end of last year, exported all my data from medium, ran medium-2-md, cleaned up a few posts and was away. I now use Pelican with GitHub Pages

I did this at the end of last year, exported all my data from medium, ran medium-2-md, cleaned up a few posts and was away. I now use Pelican with GitHub Pages and any new posts are generated from a single org file. It’s a really frictionless workflow. You can even have medium import your new posts with a link back to your own site and if you want your site to look like medium, medius is a nice theme but needed a little tweaking to get it working with the latest pelican version. All in all a fairly painless migration.