Pop vocal music is sung in Japanese.

It's a natural delicate voice plus practice the day after tomorrow. But it should be very simple after mastering the method.

When singing, open the back of your mouth, sing with a proper mouth, and then lift your laughing muscles. If possible, the abdominal diaphragm should be resisted (it may be difficult not to learn), so that the sound will be brighter and sweeter. It's a bit like national singing in vocal music.

There is a way to check, the throat and mouth are slightly open, and the vocal cords are slightly closed when exhaling, but not too tight, which will make a vibrating sound. If the vibration is even, there is nothing wrong with the vocal cords.