Job Changing

Yukichi Fukuzawa, a Japanese illuminator in the 19th century, said, "The most lonely situation in the world is that of having nothing to do."
Hobby is self-satisfying. On the other hand, work is satisfying others and earning money.
You can't live as human being unless your work can satisfy others. So, I think, you should consider satisfing others as a crucial matter on your life.
If you care too much, egocentrically and insouciantly, about your "assertivity", "pride", "worthwhile" and so on, you will be forsaken by everyone.
You can't learn even how to work unless your attitude is modest. It's because one hates to instruct the haughty people. If no one instructs you in your work, it follows that you make a detour frequently. And a job is essentially given. So you should also learn to make yourself be a reliable one so that others can give you a job easily.
Changing job means the start as a freshman. A company has its own way of its buisiness. So at first you must know the way to which you belong anew.
It's not easy to change yourself from an amateur to a professional. I think there is more severity in that process than in studying for the examination of entrance to an university. While you are working hard for one or two years, you will come to notice the depth of the job and you may come to be gradually losing your confidence. But I think, in almost all jobs, you will get self-confidence gradually in three or more years after you began to work.
The pleasure that you may be able to do it for yourself gets enlighted, and then, the serious belief that you can challenge it and that you can bet your life for it are generated. That may be an usual pattern to realize that you are likely to regard that as fagging and that you want to esteem yourself highly.
All the people have passed the same course. So I think, at first, you must work modestly, anyway. In the case that you wonder whether a thing fits you or not, you are sure to fail because you can't do your best. I think that you will succeed in changing job for the first time when you determine it with the belief that you have no other ways to live but for this only one way.