I'm thinking maybe the half

OK, so be honest - any of you who are reading this. Am I better off with the half??? I read somewhere that registration for the January 2013 marathon weekend in Disney starts either late March or early April, which is a lot sooner than I was expecting. Perhaps it's better for me to do the half in January 2013 and possibly work up to the full in 2014 if I like the half. Thoughts?