@Giampiero *********
keep in mind you're NOT applying for ANY new VISA 😮
All you would be doing is going from an extension based on education to a yearly extension based on marriage. There is no VISA involved in the process. Just changing the reason for why you had extensions.
As Ellie said go to the immigration office, get the hand out that lists the requirements and see what they say about you getting a year extension based on marriage