You must make an appointment with the Warden and then it will be taken before a Board. Usually you will be granted a lawyer from the State to start divorce proceedings. Your request is very common.
Sorry to hear about your problems and hope it all works out for you in the future.
While all states have established divorce procedures, the standard of evidence and the types of divorces allowed can vary from state to state, so its best to consult with an attorney to discuss the laws and requirements of your state before filing your petition for divorce.