Don't talk about yourself.
Ask her questions and listen to them.
This will work in your favor several ways.
1) You won't come off as a weirdo.
2) You'll seem like a good listener.
3) Since you didn't talk about yourself, she'll want to get to know you.
4) You won't put your foot in your mouth and say anything stupid, since you'll find out where she stands on touchy subjects.
Additionally, always keep first dates casual and open.
She'll feel safe and un-pressured, and if things start to go downhill, you can easily steer it to relative safety without things getting really awkward.
ETA: Wait, did you say you picked her up something?
Gifts and flowers are for girlfriends, not for dates.
Leave that business at home before she subconciously labels you a beta male, and thus, un-datable.