Many of us on platforms like this are introverts, or autistic, or have social anxiety, or for whatever reason, have trouble meeting new people or engaging with strangers. If someone wanted to engage you in conversation, what topic would you be happiest to talk about?
Places. Where people grew up, where they have traveled, where they have lived. Maybe even where they would want to go. This leads to other topics and lets you talk about something not too personal to start.