What hurdles might immigrants face before allowed to start a new life in america

Immigrants are the people who come from other countries to America and since they come from other countries, they might face certain obstacles like difference in the language, or a difference in the cultures of two countries or finding new jobs in the United States. Finding a new house to live in also poses a problem and the difference in the weather conditions like adjusting in extreme cold conditions of the united states is also a problem.