For personal study notes, a static website already covers the core needs: showing content, staying available, and keeping deployment inexpensive. HTML files can be served directly by Nginx without a database or backend service.
Goal of the first version
The first version only needs to show who maintains the site, what kind of content it publishes, and whether the pages are accessible. It is also easier to review during the filing stage when the site stays simple.
Why not build an admin system now
An admin panel, database, rich editor, and user system all raise maintenance cost. The current requirement is publishing personal notes, so organizing content as files is the most direct approach.
Future evolution
When the number of notes grows, the site can add categories, tags, search, and generated tables of contents. Each step should respond to a real need, not a guessed future requirement.