How to speak American

Fine stand for: Fucked up, Insecure, Neurotic, and Emotional

"Fine" that is said with nothing else: very bad
And by a woman: you better rethink what you just said and change it right now if you want to live

Yeah, no : no, not really.
No, yeah : yes.

This is correct

Yep. Too bad I didn't get the memo until adulthood.

I love the last one. It's true but hilarious when pointed out.