You brought up something interesting Gary. I got out at 19 and, despite all the other baggage I brought with me, that move alone probably saved my ass...and set the tone for the rest of my life. The road less traveled, if you will. I don't mind taking it.
I shared this on another thread, but I think it's appropriate here, too. Not to be maudlin, but it's about being true to yourself:http://thenextweb.com/lifehacks/2011/05/31/the-top-5-regrets-people-make-on-their-deathbeds/
What I take from that article is you can start any time you like.