Find out (something): Learn something (by reading or hearing it)
I only found out last week that she's getting married. She kept that one a secret!
When she found out he was having an affair, she divorced him.
Go out (with someone): Have a romantic or sexual relationship with someone
They've been going out for 5 years and he still hasn't asked her to marry him.
He asked her to go out with him but she didn't fancy him so she said "No."
Point out something/Point something out: Inform or tell
We had a great tour guide in Paris . She pointed out lots of secret places we'd never heard of before. When I make a mistake I hate the way he always points it out .