For Japanese specifically? Try starting with https://refold.la/how-to-learn-japanese/ . (There are various people promoting similar methods, but Refold are probably by far the most pleasant and professional option.) And in general https://refold.la/get-started/ and the Refold discords are usually a good starting point. For languages which have Muzzy https://en.wikipedia.org/wiki/Muzzy_in_Gondoland translations I'd honestly just start by watching Muzzy in Gondoland maybe thirty or forty times, then moving on to Muzzy Comes Back, before worrying about any other resources or methods. Spanish is unusually well provided for, with Dreaming Spanish https://www.dreamingspanish.com/ and also Destinos https://www.learner.org/series/destinos-an-introduction-to-s... .