Thank you for sharing your question with the Wefugee Community!
The topic of marriage is quite popular on this platform and I think you will find some useful information in various threads opened earlier. Please check, for example, this one: http://www.wefugees.de/101997/.
You also find a blog here, which describes the process and the requirements really well.
However, please feel free to get back to us if you have any further questions or clarification is needed!
All the best,