How should I act on a movie date?

Braveheart4321
So I'm extremely inexperienced with dating, and tonight me and this girl are going on our second date (my first time ever having a second date). We are going to see a movie and I don't know what is acceptable behavior, or what is expected of me at all. Should I put my arm around her during the movie? Should I buy both of our tickets, am I expected to get our snacks?

Any advice would be great.
Updates
+1 y
Saying "Just be yourself" doesn't really help, because whatever I do I'll behave and act like myself, I just don't know what is expected of me, what is standard, and other little things
Updates
+1 y
Well here we go
How should I act on a movie date?
3 Opinion