[Culverin]

Don't constantly check your phone. If you must check, do it at a bathroom break or something.

I'd recommend against the movie. It might be "easy" but it definitely won't go towards building chemistry. It's not exciting, intriguing or attractive, it's not going to build up chemistry between the two of you.

Do something interactive to take the edge off so you don't have to talk. Mini golf or a walk, or window shopping is a good idea. You'll always have objective related topic to discuss as a fallback, but you're in constant contact so you can talk more if you're into each other.