In reality, it’s not too late, nor should it rightfully be, for you to back out of it! Remember, legally there is a “grace period” to back out of something such as a contract for a new furnace or water heater. So, logically, a proposition which would literally involve giving of your whole life and very being to some printing corporation should likewise be conditional upon some reasonable sort of grace period.
The other consideration, which will hopefully end up being for you a light at the end of the tunnel, is money – that is, if you can somehow secure some employment from which you can save up a bit of money and establish some financial security, then you will have the real power to move out on your own and thus begin to assert your own ideals as you see fit, devoid of the silly little publishing corporation which seemed to hold so much power over you at the time.
My advice is to just do whatever you reasonably can toward that goal one day at a time.