You can find reputable popular magazines and professional journals using the library's ONE SEARCH tool. A few popular publications (with no paywall) include: The Atlantic, The New Yorker, The New York Times, Time magazine and others. Watch the video below and perform your own search, following similar steps. In doing so, you will discover authoritative articles and reputable sources.
After you gather your sources and review them, don't forget make an outline. Watch the video to learn how to do it well.