I have quite a very same feeling. But as a way to review things, I also write flashcards when I think there's something useful I'd like to remember, or when I'm studying. Once you start remembering a flashcard, it will appear less and less often.
It's quite simple in Obsidian with the extension "Spaced Repetition":
I built an entire app around the idea that every note participate sin the spaced repetition queue. For me it has made a lot of difference, as I have managed to internalize (as in put into a practice) a lot of the stuff that I put into my "second brain", for example insights from books I have read, videos I watched or blog posts, etc:
It's quite simple in Obsidian with the extension "Spaced Repetition":
What is foo? ? foo is bar