The length of makeup study varies from person to person. Natural learning with high talent makes rapid progress, and makeup techniques are mainly in techniques. So I suggest you find a professional and formal recording and broadcasting course. The technique needs an adaptation time, depending on your own efforts.
The offline field training period is 2-3 months. If you teach yourself makeup, it is generally 1-6 months in theory, depending on how much makeup you want to learn, the difficulty of makeup, and your own learning ability.
Extended data:
If you want to make a satisfactory makeup, you should take time to try, look in the mirror and keep trying. The attitude of makeup is to paint and play with these cosmetics and enjoy the fun.
Make-up gestures must be light, so the skin can reveal vitality, so you can't cover too much, otherwise you should master the balance between foundation and concealer like sculpture, not only to cover flaws, but also to appear transparent and natural.
Skin color is like a canvas for painting. Without a good background, there will be no good painting. If you start to make up, it is recommended to start with very light colors and focus on a few colors that you think are the safest.