Congratulations.
First off, don't over think this. You don't have to make it more complicated than it is. Personally, I love it, I mean ABSOLUTELY adore it when a girl offers to pay for herself, but on a date, you cannot ask her to do this. She can, but you can't. Wonderful equality right? ;)
Sorry, I'm a little bitter over women in that area.
Anyhow, if she doesn't offer to pay, than go ahead and pay all of it. It sucks but meh. If you're seeing a movie, try to get a good horror or action movie so she wants to hold you, feels wonderful.
But most of all, just relax, and don't try to plan this. It's not all about her. You want to have fun too, you know. :p