For students who have no foundation, I suggest you go to a professional hairdressing training school. The general course lasts about 3 months. After graduation, I went to the store to be a hairdresser, accumulated practical experience and laid a good foundation for my promotion as a hairdresser.
After half a year, you can choose to apply for an internship hairdresser, which is only one step away from becoming a formal qualified hairdresser. You must work hard. After a year of barber practice, I believe you can become a qualified barber.
If you work in a barber shop and study at the same time, it will take a long time, so you have to practice in your spare time. In this case, according to past experience, it is estimated that it will take three to six months to study, mainly depending on the individual's practical ability and mastery.
If you watch online videos for self-study, you can concentrate on mastering the knowledge outline, get familiar with the whole industry within one month, and then practice by yourself, buy some wigs, and practice for at least two months.
If there is someone to guide the practice one-on-one in person and there is enough time, then you can master and practice it quickly, and you can master the technology in about 2 months, and then the skilled process. If you study in a professional hairdressing training class, it will take about 3 months according to their teaching and internship arrangements.