first I like to say, I am a introvert, too, and I am a software engineer, too, I had a long time in the situation like you several years ago. I like tennis, so

first I like to say, I am a introvert, too, and I am a software engineer, too, I had a long time in the situation like you several years ago. I like tennis, so I choose to play it regularly, longer I play, more confidence I found I feel, and I met many people who have the same hobby, when I don't what to start, I talk some tennis news, and they really love it, and I found I can react dynamically after trying, and now, if I see some girl playing tennis, I can get close, and talk, and ...., I hope it can help you.