It is best to study in the third grade of junior high school. This period is the period of voice change. Girls’ vocal cord development basically stops in the third grade of junior high school. Boys will be later, but it is almost the same, so it is not too late to start learning at that time. I am I am a music student, majoring in vocal music. I only started to get into it in the third year of junior high school. Everyone basically got into it at that time, and it’s not too late.