The best opening message is simple: show that you noticed something in the person’s profile and ask a question that is easy to answer.
Start with a detail
Mention a hobby, favorite place, or photo they shared. “What was the best part of that trip?” is warmer and more useful than a copy-and-paste greeting.
Keep it light
Avoid questions that are too personal in the first exchange. A short, friendly question gives the other person control over how much they want to share.
Let interest be mutual
Do not send repeated messages when someone has not replied. Good conversation has a natural rhythm, and patience signals more confidence than pressure does.