Mainly depends on whether the school provides training and can give students answers in time. Semi-permanence depends on whether there are practical exercises and how other students do. Don't look down on the teacher's beautiful work. Have you ever thought about how long the teacher has been working, ten years, eight years, three years and five years? This time does not mean that you can become as beautiful as others in three to five days or seven or eight days. So, if you have practical exercises, do them yourself, and then practice with questions. This is real learning.