First, review these guides to thesis statements in literary analysis essays:
From UTA: https://libguides.uta.edu/literarycriticism/thesis
LibreText: https://human.libretexts.org/Bookshelves/Literature_and_Literacy/Writing_and_Critical_Thinking_Through_Literature_(Ringo_and_Kashyap)/12%3A_Writing_About_Literature/12.06%3A_Literary_Thesis_Statements#:~:text=Contributors%20and%20Attributions-,The%20Literary%20Thesis%20Statement,essay's%20main%20argument%2C%20or%20interpretation.
Then, think about this short story: https://www.cusd200.org/cms/lib/IL01001538/Centricity/Domain/361/oates_going.pdf
Now, consider these questions:
How does the story define or depict what it means to grow up?
According to the story, what character trait or life lesson is essential to have in order to be an adult?
Write a thesis statement over the chosen story. Be sure it:
Is one or two sentences long
Meets the criteria for a thesis statement
Includes the name of the story's author and title