@whatamidoing, when you said there was a secret to learning fast, I thought the idea was to travel to places where that language is spoken! Hahahaha. I think I need a vacation! I observe here that when we talk about the acquisition of any type of language, we must do it from the smallest structure to the most complex. That is, after we handle some words (maybe nouns and verbs) such as when the child begins to speak, we can then risk creating phrases or sentences. I feel, as you say, that verbal and scriptural practice is fundamental. Sometimes, even if you have the best method for learning, if you don't devote enough time to it, you may feel that you haven't made any progress at all. In the case of people who work daily and are busy in a thousand things, I think we should try to combine, perhaps with music in the car, with a basic application on the cell phone or simply have a booklet where you can go doing the task at any time of leisure. Of course, taking into account that everyone has their own pace of learning and there are languages that have a greater degree of complexity.
I will try to follow your advice, @whatamidoing and thanks to @adsactly for sharing this content. Greetings