The most important tip for getting started with Obsidian, in my mind, is to absolutely ignore all of the Obsidian "power users." I'm 99% convinced that no one actually uses zettelkasten seriously, but even if so, it's overkill for when you're just checking out the app. And, please, don't buy one of these $500 Obsidian courses. It's just not necessary.
With that said, I have started extending out my own setup, and one of the plugins that I like the most is DataView, which allows me to automatically link to other notes, or pull in tagged text, or to-do items. It has allowed me to really take daily recaps reliably for the first time ever, because, even if I have nothing to write, I at least have a repository of what I was doing for that day.