"The best way to gain self confidence is to do what you are afraid to do." (J. Dorsett-Koch)
What we are afraid to do is not the nature of the work. But our own nature.
The fear within ourselves.
The fear we experience when we are about doing something is the fear of failure.
And that kind of fear is in our mind.
When we can beat this feeling, the feeling of fear, we will gain self confidence.
The battle is in the mind, our mind.
The more we beat this fear in many area of our life, the more confidence we have in ourselves.