What should I say to a girl I just matched with?

Her profile is a short list of choices she made on purpose. The detail that sticks out, like a job that doesn't fit the usual pattern, an unusual hobby, or a line that sounds like it was written with a grin, is the best thing to reply to. People pick those lines because they want someone to notice them. Your first message should point at one of them. Skip the photos unless one has a clear, specific story in it, like a trip or an animal.

Also look at what she didn't write. If her bio is one emoji and a height, she may be low-effort on apps, and a long opener will feel like a lot. If her bio is detailed and playful, she is likely enjoying the game and will reply to a message with some texture. Match the amount of effort she put in.

Pick a question she can answer in a sentence and enjoy answering. Good ones ask how she got into something, what the best and worst part of it is, or what a detail actually means. Avoid questions with a yes or no answer, and avoid anything that asks her to justify her profile. Keep the message to one question and one short line of context, so the reply is easy to write. A message that is mostly about you, like a story about your own surfing, tends to get a polite reaction and nothing more.

If you're unsure, ask about a place. Places people have lived, visited, or want to go are easy to talk about and reveal a lot quickly.

Once she replies, your job is to keep the thread alive with one more small thing, not to push toward a date yet. Build on what she said and add a small piece of yourself, so she has something to respond to. The conversation should feel like two people comparing notes, not an interview. A date suggestion is premature until you have traded a few messages, and it works best once there is a specific shared reference, like a place she mentioned or a thing you both found funny.