The time of learning to mix wine in different schools is not the same and uniform. Some are longer and some are shorter. Personally, I think the appropriate time to learn to mix wine is 4-5 months. If it is two or three months, the time is shorter and the knowledge is not comprehensive enough, the teacher's explanation will definitely not be in-depth.
But if you study for 7 months, 8 months, or even 1 year, this time is a little wasted, because after studying for so long, there is nothing for the teacher to teach, and you may just let your classmates practice some fancy moves every day. As long as you learn to master fancy movements, you can practice them anywhere, and you don't have to practice them at school. Too long will waste time.
In professional bartending schools, the arrangement of bartending courses is more substantial, the explanation is more in-depth, extensive and comprehensive, and you can learn real skills for your reference.