Do you have what it takes for the job? Maybe you do. If you don’t? What can, and would you be willing to change, to legitimately be able to claim that you do have what it takes?
We can take small steps to improve on certain hard-skills and soft-skills. Doing so can be incredibly valuable. Changing who you are, in essence, on the other hand, isn’t something you can do, nor should you be asked to do.
The greater distance between who you are in essence and whom you are required to be (on the job), the more well-being problems will arise.