Practice “lateral reading,” a strategy used by professional fact-checkers to investigate the reliability of online sources. Rather than going through a website to determine whether it's credible, open up a separate tab and investigate publisher, author, images, and any cited information to get a clearer picture of where the information is coming from. Learn more with this Evaluating Online Sources through Lateral Reading Handout developed by Robert Detmering, Amber Willenborg, and Terri Holtze for University of Louisville Libraries.
There's also extensive and well researched curriculum, Civic Online Reasoning, developed by the Stanford History and Education Group.