Sunnats of nikaah

Delaying in performing the nikaah

Q: I am currently studying, but my future wife's father is sick. Some people suggested that I get married first and then continue studying. At least the father will see his daughter getting married. 

What I am confused about is, isn't it cruel if I haven't provided for her financially or spiritually? 

I think it will be difficult to finish college while working.

Dua to be recited by the newly wed spouses on the first night

Q: I would like to know about the prayer that the bridegroom and bride pray together after nikah and before consuming their marriage. How is it performed and why? I will be getting married soon and have heard about this from an old person and he has not been able to give me more details. All the others to whom I have asked, no one knows about it.