How is the life of an undocumented immigrants and all immigrants after arriving to the USA?

According to some research USA count with 10.5 to 12 million of the undocumented immigrants as a population in differences cities and states of the countries. This number has increased with the years. The undocumented immigrants like others immigrants leave their countries because of th lack of opportunies. How is the life of an undocumented immigrants and all immigrants after arriving to the USA. All imigrants and undocumented immigrants face many challenges after arriving to this country, most of the challenge is the language, culture shock, discrimination, and not having right to get benefits.