I just googled "bullet journal" and had to scroll through four screens of nonsense to get to a search result, the Wikipedia article on it.

The website linked above is actually a pretty good overview: <https://bulletjournal.com/>

You'll find an immense array of exceptionally artsy websites, videos, image collections, etc. Much as Gil Scott-Heron said about the revolution, the bullet journal won't be televised. It's a process that is oriented around your needs and workflows.

The key element to me is the index, and a set of notational conventions. Start with those and flavour to suit your needs. Spreads can be the next add. I'll also add my own set of reference sections (addresses, local hours of operation, informational, etc.) starting in reverse order from the back.

I've discussed this previously: Main: <https://news.ycombinator.com/item?id=27200255>

Additional: <https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...>

Tangentially related to the topic, but give the kagi search engine a try. It feels like regaining a focused internet back.