I mean, I'm conscious to a degree, and can alter that state through a number of activities. I can't speak for you or Metzinger ;).
But seriously, I get why free will is troubleaome, but the fact people can choose a thing, work at the thing, and effectuate the change against a set of options they had never considered before an initial moment of choice is strong and sufficient evidence against anti free will claims. It is literally what free will is.