Glad to hear about your successes in the trip! I'm still incredibly early in my own studies, but I've heard the best way to study listening comprehension is by regularly consuming media in the language. What that looks like might change depending on someone's particular interests, but I've really enjoyed putting on Japanese Twitch streams in the background for games I already know (or don't have any need to know, like competitive esports).
As expected, quite a lot flew over my head. But I was also surprised by how much I picked up on, both from the gradual improvement of my more formal studies and also from the loan words that tend to show up when talking about games. And I'm able to leverage my existing knowledge of the subject matter to just let my brain do what it can to contextualize what it's hearing.
I definitely wouldn't be surprised if there's a notable overlap there. Probably not a stretch to imagine that the technically-minded users would be more in tune with the protest.