It's a skill built through repeated action. And talking to strangers is one of the fastest ways to build it.
A stranger you'll never meet again is the perfect training ground. The risk is minimal; the learning is real.
Your brain learns from experience. Every conversation that doesn't go badly teaches your nervous system to relax a little more.
After enough conversations, you realize: I can handle not knowing what comes next. I can improvise. That realization is confidence.
Anonymous chat removes social stakes. That's exactly why it works as a confidence training ground.