You do not have to do a ceremony just wish the court papers is enough. Or you can ask and they do it say the court house.

Ok so is it necessity to do a ceremony after that?

The county websites usually have good details. In Florida unless you went to marriage counseling there is a 3 day wait period. So you get your license. Wait three days and then you can get married. If you choose the court I believe they have packages to choose from.