The price is about 120-300. If you see what you have learned in several classes, I guess it is useless for you to learn it, because pop singing also needs breath and so on. Those so-called crash courses, that is, after learning, you will not do anything else, nor will you find a suitable singing method, so that you can learn to sing a song and it will be over. If you think it's okay, there's nothing you can do.

By the way, there is also the so-called throat singing, which I personally oppose because the voice is not good at all. Maybe I don't like it because I was taught by the traditional vocal music teaching method. It's purely personal. Popular singing advocates nature and feelings, and can be learned even if the voice is hoarse. This is a method that anyone can learn. Even if it is not as obvious as throat singing at the beginning (throat singing can be sung very high), at least people won't think your voice is unnatural.

You can leave me a message if you are interested.