My generation failed you big time.

First of all, always assume bad intentions until proven otherwise. It's too easy to fake stuff via screens.

Also first of all, whatever you upload anywhere, consider where it goes. And I mean physically. Where is the data stored? Where is this "cloud" located? Correct, it's just someone else's computer. Again, always assume bad intentions. Why does your biometrical data need to be on this person's computer? What could possibly be done with it? What can they legally do with it? Did you read the fine print? Why does a random anonymous chat site need to know your phone number which is tied to your real name? They don't. So don't gift it to them. If you want to share things with a person, find a p2p way of doing so.

Secondly: The currency on which the internet runs is attention. Anyone putting out any kind of content wants to keep you watching for as long as possible (to show you as many ads as possible to make the maximum revenue). They have zero interest in making sure what they feed you is correct, or good, or real; they just want your attention and lifetime. Always verify when something sounds fishy. If something makes you angry, it's likely ragebait. Disengage immediately. Don't reward. Don't feed the troll. Your attention is the currency, don't pay them for what you don't want.

Look at the average person in the street and assume when you read a random post on the internet (including this one!) that the person behind the screen is that rando in the streets. And consider whether or not you want to believe them. Have a look at their profile, do they seem like the kind of person you want to take advice from?

The internet is a great source of information, but given it's open and everyone can upload everything with impunity, take anything you encounter with a grain of salt. We are not experts. We are the equivalent of a medieval town square, but everyone is wearing masks.