Look into a static website built with Hugo. You'll be creating pages in markdown like obsidian. You can host it locally so there's no privacy concerns.
If you want it externally facing then there are some options but you'll need to find a site to host your static website and who you're comfortable with their privacy policy.
They have bundled malware from the main downloads on their own site multiple times over the years, and even denied it and tried gaslighting people that AVs were giving false positives because AV companies are paid off by other corporations. And the admin will even try to delete the threads about this stuff but web archive to the rescue...
https://web.archive.org/web/20180623190412/https://forum.filezilla-project.org/viewtopic.php?t=48441#p161487