>>9034617i'll explain in english just because its easier
vocabulary, even in your native tongue, is largely from reading books
and not even a lot of different books, often the same one over and over again just to internalize the syntax of it, if that makes sense. so find a book you really like and try over and over until it makes sense.
or go turbo weeb and watch anime without subs and play VNs all day for that immersion affect which i consider to be the most important thing.
neural plasticity and age is a meme an 80 year old could pick up another language if he wanted to its just that the learning material is so shit
then you can set your phone and computer to japanese so literally nobody can even use them but you