Note by @fastfinge

@clv1 @hongminhee @patricus Yup! With French, I tried:
* in-person classroom instruction (both in school and extra-curricular): material is often inaccessible, teachers are mixed quality, I eventually lag behind everyone else in the room and get left behind
* total emersion (I live in Canada and have extended family that doesn't speak English): I never manage to take anything in, and just freeze up when addressed directly
* independent correspondence courses: materials are more accessible and I can go at my own pace, but no matter how I study, I can't pass the tests or use what I've tried to learn in real life
* apps (duolingo): accessibility varies. I eventually get pretty good at doing the exercises offered in the app, but that never generalizes in a way that lets me pass any formal tests or use the language

My measures of success are:
* able to have basic conversations in the language
* able to pass Canadian government tests to be certified in the language for career purposes

I have never achieved either of the above. And after eight years of failures, I've pretty much given up.