In "Eavesdropping," how did author Eudora Welty forshadow her eventual epiphany and writing style in the beginning of the book?

The author of "Eavesdropping", Eudora Welty, depicted herself as a silent type of person and quite an introvert. She doesn’t talk much or interact with others. Oftentimes, she eavesdropped the conversation of other people to be able to gain knowledge of their behaviour.

In the beginning of the book, she has depicted being a child who preferred listening to others rather than talking. In the end, as she grew older, her epiphany was that eavesdropping inspired her to write stories.