I am an American Citizen and want to marry a Guatemalan woman in Guatemala. I know the laws needed to make it legal there, how do I make it legal here

You should start by contacting the Guatemalan Consulate. The Consulate may be able to give you an overview of the process. If not, you would need to contact either the agency that oversees the issuance of marriage licenses and certificates or an attorney licensed to practice law in Guatemala.