Hello Mina
You just need to apply for a short stay visa indicating you are the relative of a Spanish citizen that resides in Spain. You will have to prove the family relationship via a marriage certificate. You will easily get a visa to travel to Spain, based in the EU regulations concerning free movement of EU citizens within the EU, as well as their relatives; Directive 2004/38/EC of the European Parliament and of the Council of 29 April 2004 on the right of citizens of the Union and their family members to move and reside freely within the territory of the Member States amending Regulation (EEC) No 1612/68 and repealing Directives 64/221/EEC, 68/360/EEC, 72/194/EEC, 73/148/EEC, 75/34/EEC, 75/35/EEC, 90/364/EEC, 90/365/EEC and 93/96/EEC.
Once in Spain, you can file the residence card application as the relative of an EU citizen. This application is filed in person at the correspondin Immigration Office of the province where you will be settling. You can find more information here.
Regards
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