You look for information from the original source, not opinions. You take that information and come to your own opinion. You validate your opinion with an open mind and curiosity - look out for people who can challenge their views. You introspect and change your mind. You also say that some information is beyond your comprehension and “too hard to understand”. “I never allow myself to have an opinion on anything that…
Same with research papers, data sheets, raw press releases, etc. Like it or not - you have to rely on 3rd party summarization and information selection.