Sweet separation, Squirtle opened the Yi Bei Vocal Music Class, and you can find his related videos on the Mile Mile. You can see ... at that time, a person was about 4,000, and there were two classes a week for about 8 months, not 1v 1, and there were about 170 students in one class.
It feels more like a big class at school. The teacher finishes teaching the things in the video, which is the kind of course that "the master leads the door and the practice depends on the individual" ... Although you can send practice sounds and recordings to the teacher, the first is that there are many students, and the second is that the teacher can't hear your detailed questions only by recording.
In other words, if you are a beginner, you can take online classes in big classes like Melody and Yi Bei. For example, the first stage of audition can effectively improve your pitch and rhythm. At least you can understand what singing is all about ... but only you can understand the details.