It is difficult to have a definite answer to the question of how long it takes to learn makeup to become a teacher. Makeup is a skill that requires constant practice and improvement, and it takes a lot of time and effort to learn and practice.
Generally speaking, beginners need to master basic makeup skills and theoretical knowledge through systematic learning. This stage usually takes anywhere from a few months to a year. In the process of learning, you need to keep trying different makeup looks and techniques, and gradually become familiar with and master the techniques and methods of makeup.
However, to become a good makeup artist, you need to keep gaining experience and improving your skills. Even if you already have basic makeup techniques and theoretical knowledge, you need to keep trying new makeup looks and techniques to keep pushing your limits. This process can take several years, or even longer.
In addition, being a good makeup artist also requires keen observation and creativity. You need to be able to design the right makeup and look for different occasions, different people, and different needs. This requires a wealth of imagination and innovative thinking, as well as a unique understanding of fashion and beauty.
In conclusion, how long it takes to learn makeup to become a teacher depends on a number of factors, including your learning pace, skill level, practical experience, and creativity. But as long as you keep learning and practicing, I believe you will be able to become an excellent makeup artist.