The tricky part is to get the Green Card. You have three options
1. through Marriage
2. If an employer wants to hire you and support your work permits. The high technological sector employs foreigners, such as Microsoft, Apple etc. Even the health care sector can hire foreigners; however, it depends where you were educated. Any membership of an organization, criminal, political, or any other which the US views as hostile, then it does not matter. You will not get a work permit.
3. The Green Card Lottery
Entrepreneurs are simply those who understand that there is little difference between obstacle and opportunity and are able to turn both to their advantage.