Absolutely this. I had a similar experience, where first I didn't know what I stumbled upon and then I found the explanations and intros but still feel like I'm

Absolutely this. I had a similar experience, where first I didn't know what I stumbled upon and then I found the explanations and intros but still feel like I'm scratching the surface. Also, somehow, in this context, the phrase "astronomically small" makes perfect sense.