You will learn lessons. Each day in this school you will have the opportunity to learn lessons. You may like these lessons or think them irrelevant or stupid. It makes no difference, you will learn lessons. There are no mistakes, only lessons.
Growth is a process of trial and error, experimentation.
A lesson is repeated until learned. A lesson will be presented to you in various forms until you have learned it. When you have learned it, you can then go on to the next lesson. Learning lessons does not end. There is no part of life that does not contain its lessons.