Octarine takes the Obsidian approach, it just focuses on the really important stuff.
What Is Octarine?
Octarine is a writing app, currently available on Mac, but also coming to Windows and Linux.
Its billed as a productivity app because it aims to help you organize your writing, mainly short notes.
The app is free and you could download it straight from theOctarinewebsite.
Next, familiarize yourself with basic note-taking:
The Quick Actions menu contains some very useful features.
How Do Templates Work?
The app comes with two sample templates: Daily Standup and Gratitude.
These are normal markdown files that live in a hidden directory (.templates).
This shows all your notes with lines joining those that contain a link to others.
The Graph can help you visualize more complex collections of notes and navigate between them.
Another great feature is the Daily Desk.
This helps you take one note per day to act as a journal.
It may help you understand other, more complicated apps like Obsidian.
The developer is actively working on things like keyboard support, and the community is small but active.