Memrise is pretty good (or was, when I used it years ago). Much more serious, less gamified. I found Babbel's lessons to be very helpful, they do a good job ac

Memrise is pretty good (or was, when I used it years ago). Much more serious, less gamified. I found Babbel's lessons to be very helpful, they do a good job actually explaining the rules of things to you, but they have a smaller selection of languages to learn and I believe they only have a brief free trial; there's otherwise no free tier. For Japanese: Wanikani (for Kanji) and Bunpro (for grammar); nhkeasier.com for reading material. Ideally also get an Anki deck that complements Wanikani for other vocabulary.