Well unfortunately you won’t ever really learn how to speak the language if you don’t speak it to others.

You yourself just admitted you reached a barrier and can’t make more progress.

The next step to learn is to get over that anxiety and actually speak to someone.

I actually had this exact thought when I heard about those new regulations. “Huh, sulfur dioxide increases light reflection, I wonder if those ships were actually helping slow down global warming” and it’s a trip to see this now.

Talking to people who actually speak the language is a huge help, because they will use more complex vocabulary naturally if they aren’t stupid, and the best way to learn a language is to make yourself use it.