http://www.visajourney.com/content/k1k3aos
It's a long, complicated process taking many years. And whatever you do, do not lie or fabricate any information at all, whatsoever. My ex husband learned this the hard way and literally lost all rights to get his green card forever.
I have a close friend who applied as a regular person, no husband or family ties, and it took her 14 years AND the help of an esteemed university where she is now teaching.