

For something like this, I think I would use Hugo to generate a static site. You write the post using markdown then tell Hugo to regenerate the site.
If you want to publish and receive comments or feedback via the fediverse, you might take a look at WriteFreely. Simpler to use but more complicated to setup.
Wordpress is also an option, but I personally don’t like it much. I spend all my time playing with all the knobs and never actually publish anything.
https://github.com/awesome-selfhosted/awesome-selfhosted#blogging-platforms
Heads up on the copyright thing. Copyright is different nation to nation. @ThePowerOfGeek@lemmy.world seems to be out of the UK or EU. Not sure what the copyright situation is like there but here in the US, anything you write is already protected under US copyright laws from the moment it’s published (such as when I hit “post” here), subject to any applicable agreements you’ve entered into, of course.
You don’t HAVE to register your work for it to be under copyright protection, but to doing so would give you a stronger case if you ever decided to go to court over copyright. To register a work in the US you would do so through the Copyright Office.
In general though, @ThePowerOfGeek@lemmy.world is right though, you should assume anything you put out in the wild will be used in a manner you never intended, and that you may not like.
For examples of how helpful copyright protection is in a practical sense, might want to check out c/piracy.