You learned your native language by immersion, not by swallowing and regurgitating spoonfuls of grammar and vocabulary. I remember a study about language learn

You learned your native language by immersion, not by swallowing and regurgitating spoonfuls of grammar and vocabulary. I remember a study about language learning that concluded that it's a matter of age and that the older you get the more efficient you learn by using a systematic top-down approach. On the other hand, immersion over a longer period of time doesn't guarantee you make any advancement.