Usually, teachers will give the students sufficient time to practice all the basic moves first before quarrying in the more intense techniques. It will take a student at least 2-3 years of experience before letting him handle the tao (knife or short sword). If the student is really good and has already mastered all arts within a year, then he can be a candidate to learn the tao earlier than expected.
It will take a student at least 10 years of Tai Chi experience to handle the real thing. Point is, teachers take their craft very seriously. That is why some hesitate to teach the sword unless they are sure that the person can handle the blade in its essence. It is seldom to encounter a master that teaches the sword because it is a very dangerous thing to learn especially if the person in not really equipped to learn it. Some will not teach it at all.
That was before. In this generation, there are a lot of teachers that allow the students to learn the way of the sword, instantly, after knowing the basic of Tai Chi. As a sort of progression first, they would teach the students the basic things like standing meditation. Push Hands will come next. There would also be...