A man lives a life in his dream. He falls in loves and haves 2 kids. He then wakes up from a coma, and realizes that he's wife and two kids were imaginary. He becomes depressed. and goes to a psychiatrist. (And ends up killing himself. I don't know if that should be the end or not)

I think all you’ve given here is the inciting incident (a man wakes from a coma to discover his enter life – wife, kids, job – was a dream). What we need to know, after that small piece of information, is – what does the character then do. What is their goal? What is the opposing force to that goal? What happens if they fail?

You don’t need to give the end away, if that’s when him killing himself.

Also, he seems like a totally generic character at the moment. If you could describe his most defining characteristic, that internal part of himself that is going to need to change in order for his inner journey to be complete, if you could put that into just one adjective … what would it be?