In recent years, the rules for moving to the USA have changed, due to world events.

The latest details are as follows:

An immigrant visa is required of anyone who wishes to enter the United States to reside there permanently, whether or not that person plans to seek employment in the United States. U.S. immigration law provides for the issuance of immigrant visas in four general categories:
1. immediate relatives
2. family based
3. employment based
4. Diversity Immigrant Visa Program (known as the "green card" lottery)

Immediate Relatives are defined as:
Spouse or Minor Child of a U.S. Citizen, Parent of a U.S. Citizen, Step-parent or child of a U.S. Citizen, Spouse of a deceased U.S. citizen. Grandparents, aunts, uncles, in-laws and cousins cannot sponsor a relative for immigration.

For family based immigration, the following applies:

Unmarried Son or Daughter over the age of 21 of a U.S. citizen, Spouse or Unmarried Son or Daughter of a Lawful Permanent Resident, Married Son or Daughter of a U.S. Citizen, Brother or Sister of a U.S. Citizen. Again, Grandparents, aunts, uncles, in-laws and cousins cannot sponsor a relative for immigration.

For an employment based visa, in general, a specific offer of employment from a U.S. based employer is required to qualify for immigration in the employment based preference categories.

UK Citizens cannot apply for the current Green Card lottery.

I'm 17 and leaving college in july and september 2009 i will be 18, at 18 could i move to america because im not sure bout it all yet.