Hallo kathy,
First of all congratulations for marriage I am also in same situation I got married in November 2020 and I directly give my marriage certificate to ausländerbehörde and still wait for termin for Aufaufenthaltserlaubnis in case ausländerbehörde is so unfriendly and not helpful, I dont know in which are you are registered?I have some friends who got married and after short time they get termin for Aufaufenthaltserlaubnis. It's depend on ausländerbehörde how friendly and helpful they are for foreigners. But at least you send marriage certificate and ask for Aufaufenthaltserlaubnis Termin.