All I can suggest is to read many sources. Keep a mental tally sheet. See which sources correct themselves when they are proven wrong. Note how often they present provably false information. Try to look up the original source material (some will misquote or distort to advance their agenda). Look for widespread corroboration from other sources. After a while you'll know how each spins their information, how well they vet their material, and their overall journalistic integrity. That will allow you to rank credibility.

Misinformation often has only one source, and that source will usually have a history of misinformation or extreme bias.