Jot down all your “categories of personhood” (e.g. woman, white, college student, American, etc.). Then think about each one singly. What do you have to say about college students, for example? Do you see any trends in this category? Like: how are college students different today than they used to be? If this trend continues, what will future students be like?
Most comedy starts with noticing something. These categories, or lenses, should help you notice stuff and come up with insights.