Javascript is used everywhere, yes, but you definitely should spread your focus to other languages as a student. At minimum definitely dig into C for low level understanding and rigor, and a “real language” like C# for exposure to all the great features and paradigms in that world.
It’s fun. There are two angles you can come at how lightsabers work from: how they work in the Star Wars fictional universe, and how something like that might work in our universe. The former builds out the fictional universe into something more “reasonable” in the sense that you can reason within the internal rules of the fiction. Reasoning about fictional worlds, especially with other people, is very fun (see D&D, or religion). The latter is a fun scientific diversion that could even lead to real inventions.
What exactly do you think Jumanji is? It sounds like you think sleep is like Jumanji but in the movies you don’t go into Jumanji, Jumanji comes out of Jumanji. I mean technically one guy, Robin Williams, goes into Jumanji, but the rest of Jumanji is that Jumanji comes out of Jumanji, so it’s not like sleep, and suggesting so makes it clear you don’t know what you’re talking about. Anyway if sleep was like Jumanji you would need medicine and rope and such to get out alive (from the series of jungle emergencies), not just coffee, so maybe try being prepared next time?
“I couldn’t resist lol” probably not an acceptable excuse for breaking the one and only community rule?