I am traveling to limbe cameroon this summer I plan getting married there how do I start my travel process never been out of usa

You will need to obtain a U.S. passport assuming you are a citizen and do not already possess one. You may need a visa to visit Cameroon. You should contact the Cameroon Embassy in the United States to determine whether a visa will be needed. This Embassy can also provided information as to what documents will be required to get married there. Once you have married, you may be able to petition for your spouse to become a resident. You can read more about the process at http://myattorneyusa.com/family-immigration.