Duolingo is useless for learning to speak to people, for one
Duolingo is a bit like Notion. It makes you think you are achieving things but the direction is completely incorrect.
By "environment" I mean of course apps + devices (combined with real-world sources, perhaps).
Of course, we live in a world where the translations apps on ours phones are approaching a "universal translator" level.
I didn't try english though.
Esperanto is super easy if you speak both french and english. But man there is less content on the internet than klingon...