We jump straight into grammar rules and forced speaking practice and then wonder why nothing sticks. But decades of research in second language acquisition show a better way a two-stage approach that mirrors how we learned our first language.
I have been using Duolingo for almost 3 years to learn a language, but I don't know anything at all.
Of course, I have some basic vocabulary from the vocabulary words, but it's not conversational level. I'm currently considering buying textbooks and workbooks.