Marriage

Is she going to be with you in person? Wasn`t sure since you mentioned you met online.
Anyway once you get your marriage license and follow the necessary rules for your state ( some states require a waiting period or counseling), you can get married. Call your court house and see if a notary can marry you too as an option. Many times the courthouse will have a list of people who will do the type of wedding you want.
Basically the best thing to do is to call your county courthouse ( clerks office) and they can answer any questions you have. Every state and sometimes county is different.
Hope this helps!