I'm glad to answer your question. I also teach myself Japanese in my spare time. I think online school is really possible, but it is very expensive. Generally, it costs thousands of dollars to learn Japanese at the primary level. Moreover, I think that although the teacher spoke in detail from the online video, I think there is a disadvantage that I am more relaxed when watching the video, which will make me dependent on the video. Without video, I don't want to read and learn, and I don't want to recite. I think there will be some shortcomings in this respect. I am reading this set of books on communication standards between China and Japan. No matter who thinks about it a little, they will understand. Personally, I don't think it is necessary to go to an online school if you really want to learn. It is enough to teach yourself a few textbooks, so that you can exercise your ability, spend less money and be easy to understand. As long as you can recite the initial pentatonic scale, whether it is primary, intermediate or advanced, it is much simpler than reciting the pentatonic scale. 95% didn't learn it later, and most of them didn't want to recite the pentatonic scale at first, so they never learned Japanese again. As for learning badly, I can only say that from the beginning of memorizing pentatonic scale to N 1, there is nothing they don't understand, only those who don't want to memorize. Whether reading books by yourself or studying in online schools, you are eager to learn, lazy and unwilling to recite, and you will never learn.