Man, TED talks suck.
That guy scammed you into learning a conlang with the excuse that it does something that all languages do and nobody is even telling you.
Just learn a romance language if you want access to a family of concepts that will carry over easily, friend. It comes with the bonus of being able to talk to people.
Anyway, I’m often light on personal info here, but I’m in a bilingual territory, learned English as a kid, the basics of a couple others through life stuff and I get a few more through osmosis because all languages do that Esperanto trick.
That seems more like a teaching methodology problem than a target language problem. Honestly, I don’t know where you are, but the way English is taught in schools in many regions is terrible, so that doesn’t tell you too much about the relative merits of learning Esperanto.
But hey, if you got it out of your system that’s good for you. I don’t begrudge anybody learning a language, even if it’s a made up one. I just wouldn’t want to support the idea that monolinguals should go out of their way to tackle conlangs, or Esperanto specifically. Go learn something you’re curious and motivated about.