The answer to this question was also something I eagerly awaited, and gratefully now I have found a proper solution. I’m happy I can share the answer to this question here. Hope it helps you.
Before, I tried to find the solution outside myself. For example, reading a book that helps me control my mind, having advice from others, etc. At that moment, those words touched my heart, but they did not fundamentally solve the source of my fear.
As I meditated, I could fundamentally get rid of my fear of failure in me.
What I did through meditation is look back at my mind thoroughly and empty it.
While I reflected on my mind, what I realized is that all the causes of fear are 100% within my mind not from the outside.