Combined-Arms:

EVERY dimension you can stack, syncopating between them, so that whichever leverage works for you, it's dismantling the unconscious-mind entrenched non-knowing you're working on displacing.

Pimsleur is the standard for making language automatic.

The problem is that it doesn't show you how your form the sounds ( may not be your problem, definitely is a problem with more-foreign-languages, for me ).

yt videos in the other languages, showing both simple-basics & social-situations, or whatever it is that you want to be watching ( maybe high-school science would be more interesting to watch than social-drama/stuff ).

Flashcards for getting the has-to-be-imprinted stuff, like verb-tenses, automatic..

intentional-socializing: asking some specific friend/group to help one learn..

Tandem, where you pair-up with someone for sake of learning: you help them learn, & they help you learn..

In short, use every angle/leverage you can, & keep applying them, until the ignorance yields, leaving language-facility in its place.

Young-people are essentially learning-sponges, so this perspective makes no sense for them, but for old people, this is how it works.

Oh, & learn songs, too: they're learned by one's non-linguistic hemisphere ( right, for 85% of the population ), so that's another angle/lever to be using in learning language, too.

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