Send private messages to people you don’t know (and probably wouldn’t casually talk to in person).
You are building a private space with a person whose life you can track everyday. You are making yourself vulnerable while staying in your comfort zone at the same time. It is much easier to control and hide all the weaknesses through online communication since there is no body language and there is always more time to reply than in the offline life. And if the person doesn’t reply, there are no other witnesses to your failure. If they reply you can get a unique piece of them in your inbox and from there ensure the communication in offline life as well.