I just met a girl and i need to know what to do?

Ok so i was introduced to this girl about a couple months ago. Fast forward a few months....never made contact with her in any way until her family and mine go on a trip to an amusment park. On many of the rides we enjoyed ourselves. Durin a boat ride we held hands for a brief moment. When we left we were talking all the way back. I want to know what should i do when i talk to her again. Ideas?