Victor,
It's been a while since you posted this so maybe you have learned this already. A Catholic is not prohibited from marrying a Protestant. I am glad that is not the case, or my wife would not have married me. I went through RCIA and became Catholic during our second year of marriage.
A Catholic only needs permission from the Church (the priest) in order to marry a non-Catholic. https://www.catholic.com/qa/what-are-the-requirements-for-marrying-a-non-catholic-christian