Talk about your passions. You're likely to be knowledgeable about it, and sound excited when you talk about it. you will light up, will be inclined to be animated, funny, involved. You'd cease to be just some guy hitting on her but will become a guy who has a life, a life that may even interest her.
The excitement you express when you talk is sure to rub off on the girl and she will suddenly start being excited about you and with you. Then ask her about her own passions, what's keeping her excited and thrilled. Avoid dwelling on downer subjects like the work or boss or prof they hate.
Of course, you have to make sure you don't come across as a salesperson pitching a product. And you should not bombard her with all the facts and trivia about something. And secret collections of cl!t vibes and S&M journeys are not good (initial) talking points... your family or birthplace or college course are.