What are you doing talking about? Rey is obviously a flight nut. She knows everything about the Falcon because she is obsessed with it. She knows the ins and outs of tge star destoryers. See even weaes the helmet of rebel pilots in the beginning of the movie. Plus, she says she has flown before.
What more do you need to establish that Rey not only knows how to fly, she is in fat a fanatic?
I guess I saw those moments differently than you. The fact that she knows about star destroyers has nothing to do with piloting skills. Engineers/mechanics are not pilots and vice versa...Up to that point, I understood that she was mechanically gifted but not a pilot. She is also a product of her environment..as a scavenger, she has to become familiar with these vessels if she plans on surviving. None of these things mean she can fly.
As for the falcon, she didn't even know she was on it until Han Solo told her so, so I don't know how obsessed she could have been with it.
The moment she wears the rebel helmet (to me) was a moment to convey a longing to leave Jakku. There is nothing in that scene at all that denotes that she can fly.
I get that she is a fanatic about these things but none of things imply the ability to fly...Personally, I love the SR-71 Blackbird...I've never flown it and (more importantly) I wouldn't know how.
But you mention she says she's flown before...when did that happen? I've seen the film 3 times and I don't recall that at all.