Glad you ask us for help!
Don't watch a movie on first date, you'll be more focused on the movie then on the girl ... xD
You want to let her talk 24/7. Just let her talk and listen (Movie will kind of ruin it)
Just go for dinner or just some drinks. (offer to pay for her food/drinks)
You can also take her out for a picknick close to a lake/beach. (watch out for mosquitos)
It's pretty romantis and you can lay down and watch the sky together.
if you both like sports, try go do some rockclimbing, tennis, swimming?
It's really fun to do something with sport, it will break the ice at the start ^^
tl;dr
The things above didn't work for me, so might just want to ignore them.
Khaleesi