The first posts set expectations for both the reader and the writer. They do not need to be definitive. They need to make the site feel alive and give you a pattern to repeat.
Start with three pieces
Publish one post that explains the theme, one that gives a practical method, and one that records a specific observation. Together, they show range without creating a huge launch burden.
Leave room for change
A young blog should be easy to steer. Categories can shift, titles can get sharper, and the point of view can become clearer as posts accumulate.
The goal is not to launch with a perfect archive. The goal is to create a place where the next useful idea has somewhere to go.