Whether it is after graduating, getting a certification through professional studies or just passing a subject, it is always a wonderful feeling. However, when you try to test your achievement right after clearing the professional exams, you feel the disappointment! The problem is that professional studies are just a foundation and your actual grooming starts once you literally begin working somewhere.
You try to help people out around you with the bookish knowledge you received and end up being confused yourself. You try to apply the theories you learnt during your studies. You try to implement them in real life but somewhere down the line you realize that this must not be the effective way to solve these issues.
True-theories from books are not usually effective when applied to real life situations. And you figure this out when you start working or try to learn that from someone experienced. And yes, that is the right way- to learn from your work experience!