Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
The rulings of marriage, divorce, etc. are thoroughly discussed in all books of fiqh. Some of these books have been translated into English. Know that talking to an alien man is not allowed for a woman except within the limits of necessity and provided respecting all the rulings of Shariah, like being in Hijab, not staying alone with him, and not talking seductively, etc. Instead, you have to contact Muslim scholars and Islamic Centres to carry out this task. Moreover, a kafir should be called first of all to believe in the Oneness of Allah, His Prophet (Sallallahu Alaihi wa Sallam) and the similar fundamentals. There is no benefit in giving details about other such matters. Allah knows best.