First dates should be quite generic. Actually, if you think of it, instead of the movies you should rather go to a nice little cafe and have a chat. Getting to know each other is a very important thing of in the beginning. After you know more about her, you could figure out a less “generic” place to go that you both will like. For instance, if she likes guns - take her to a shooting range. Not the most romantic thing you can imagine, but she will love it.
But the utmost important thing is to treat her very well. If you do - success is a guarantee.
Also, you should remember that no matter how serious the relationship feels - you’re both still pretty young. Don't take it too seriously and don't focus on planning a future with her. It might sound harsh, but my experience says those relationships almost never last.