Some key things to consider when finding sources are ;
- when was it made? is the info still relevant to today?
- who wrote/made it? Is there information about the author anywhere?
- where is the source located? is the source in a big new channel website or a small anonymous website?
- last thing ! check the website's URL does it have .org, .edu, or .gov ? websites with this in their URL tend to have reliable information
Hope this helps !! :))