You will need a basis to apply for a green card regardless of whether you retain an attorney. Most individuals are able to adjust status to permanent resident through a family-based or employment-based immigrant visa. It is not clear whether either is a viable option for you. You can read more about immigration at http://myattorneyusa.com/immigration-to-the-usa.
Answered on May 04th, 2016 at 3:56 AM