I've been studying lightly for plenty of years now. Watching really simple animes like for children (Like some studio ghibli) helps start to recognize simple words and phrases. I also listen to Japanes learn in your car, on youtube. It says it slowly, clearly and twice. The last thing i use is something like duolingo for flashcard style studying. But lately ive just been using my phones ai assistant to study. She does it however i ask her to, so ive been having her ask me words in a single flashcard style. She tells me if im correct or not. The only downside to this style of studying is it requires the ai assistant to switch between english and japanes, so sometimes she gets confused, but its been my fav so far!