People in theatre work harder than anyone in the world - as far as I'm concerned - as far as sheer output of energy and the rigor and excellence that they maintain doing something every day, or twice a day.
Write about small, self-contained incidents that are still vivid in your memory. If you remember them, it's because they contain a larger truth that your readers will recognize in their own lives. Think small and you'll wind up finding the big themes in your family saga.