I am 44. I just signed a new three-year "overall deal" with 20th Century Fox. Yay. Before being a TV writer I had failed as a classical actor, dancer, choreographer, acting teacher, private investigator, mime, bread-truck driver, stand-up comedian, hat wholesaler, movement teacher, and playwright. Actually I was was pretty decent at teaching movement. If you were doing a type of theatre that demanded near-constant full-body gestures based on primitive iconology and rage. And who doesn't like that?
And I wrote plays. Eventually, (after my 367th script rejection to be exact) my wife said "no more f##king plays will be written in this house." So I started writing tv specs of existing shows. I wrote a LOT of them and studied the form for three years in and out of grad school. I moved to L.A. at 34. I entered script contests. And did very well.
I think this website is intended to encourage you to attend UCSD. I hope it will also encourage you to fail and fail and fail at a ton of stuff in your life. At least that's what worked for me.