Generally, people who learn yoga are sisters, and of course there are younger brothers, but most of them are sisters. As for how to test yoga instructors, we need to go to the instructor training school for systematic training. Of course, self-study is also possible, but self-study is not recommended. Why is it difficult to find someone to help you solve the pose problem in the first place, and then even if you do, there is no one to help you? Moreover, there will be many students like you studying at school, who can make progress and communicate with each other. And self-study is impossible.