I know this comes off as insipid, but how would one come to 'know what they are doing'? Sorting the wheat from the chaff when it comes to amateur stock trading

I know this comes off as insipid, but how would one come to 'know what they are doing'? Sorting the wheat from the chaff when it comes to amateur stock trading advice is exhausting, and I would appreciate someone knowledgeable telling me what the best resources are, what their methodology for making money is.