Moving to Germany

I question the wisdom of wanting to marry a man you have never met. The lifelong commitment this entails is not something to be taken lightly, especially when it also involves a big intercultural change and move. I think you should get to know him in person for many months before you make that decision!

If your country's marriages are recognised in Germany (Shariah or other non-governmental weddings are usually not), you can apply for a family reunion visa right after your marriage certificate has been issued and officially translated into German. The process takes about three months.
You should inquire at your country's German embassy about the procedure and requirements.

Thanks a lot Beppi!
I got it now.

Like Beppi mentioned, it sounds strange to be planning to marry someone you haven't met yet. Officially marrying a German is of course the most obvious way to get a residency permit but there might be some questions if it is a legitimate marriage or one of convenience. I think German officials might be rather skeptical hearing you married a few days after your first actual meeting... So you had better have some convincing answers to such questions because they are likely to come up.