Well, we all know that self-esteem comes from what you think of you, not what other people think of you.
There are roles that are terrifying because they're large or you may feel that they're out of your line, but I'm never terrified once the actual work begins. Once you begin rehearsal, then it's small building blocks. It's solving little problems one at a time.
The heart of a mother is a deep abyss at the bottom of which you will always find forgiveness.