I have been keeping and growing my Zettelkasten with Obsidian for about a year now. I can't say that it have been extremely useful, in terms of the work I produce, but that is clearly my own fault. I do expect that at some point I will start producing more writings from my Zettelkasten.

Meanwhile, I suggest you don't get discouraged. Start simple. Download Obsidian (obsidian.md) and start making notes. I like to keep the following format:

""" [[Source of Idea / Book / Article / Tweet]]

> quote that sparked my though

my actual thought.

Tags: [[Thinking]], [[Thoughts]] """

And continue connecting. Don't be too harsh on yourself, keep growing it slowly and you will reach a point where your graph is very superconnected.