>>21039585I know 4
Start studying the basics and once you learn enough to understand some media start consuming it in that language.
Studying actively is tedious as fuck, but playing a videogame isn't, and if it's in another language, your brain slowly starts learning like a sponge and getting used to it. If you don't know a word, look it up, but don't consume media too complicated for your current level. If you are a begginer at japanese, try Pokemon in it's kana version.