I need help, just went on my first date?

Don't think of it as a "date", just think of it as hanging out. From what you said, your "date" went really smooth. Don't have any expectations, just go there and chill and have a conversation about anything. Have fun and tease her here and there. BUT, you must always remember your ultimate objective is f*** her, so try to get into her or your bedroom to "hang out" if you can. Good luck!!