Breaking the ice with a girl on a dating app starts with sending her a message that piques her interest. Use information you gleaned from her bio to ask an open-ended question in your first message to her.
This lets her know that you read her bio, and you score instant brownie points for this alone. A message that references information she provided in her bio compels her to respond to you.
Once she does, use humor and flirtation to retain her attention. Too many guys on matchmaking apps make the mistake of playing it too safe in how they chat with women they are attracted to on dating apps.
By sticking with conventional topics and never branching out into cracking jokes or flirting, you bore her. She soon loses interest in reading your messages because she knows what to expect. Boredom.
Even though you are an introvert, you are actually at an advantage by being on dating apps. Dating apps give you an opportunity to approach and engage in conversation with the girls you match with.
This is far less intimidating than approaching a girl in real life and trying to initiate a conversation with her. On top of this, you already have a bunch of information from her profile to help you come up with a topic to talk to her about on a dating app.