Jazzy,
What a great offer!
Check out the Customs & Immigration Service website for green card info.
USCIS - Green Card
Allow about 3 years to get a green card. Thats how long it took us. And a budget of quite a few thousand dollars. Without one of those you don't have much of a chance of being allowed to earn money. That website should help with info for you.
Try googling forums for expats living in the US from your area. You will find lots of helpful info on those, with people giving details on their experience of dealing with trying to get a green card.
Good luck.