You can start by first applying for a US visa. Filing for a U.S. visa can take time from a few weeks to years, and this depending on the type of visa you want, and also your status in relation to the United States. Find out more details here http://www.ehow.com/how_4011_apply-us-visa.html.
A lot of people want to live in this country, but it just isn't that easy. It's not as simple as "oh, I want to live there.". Talk to the American Consulate. You can only find your answers in your country. Each application is individual. We can only provide well meaning guesses. There is the mail order bride option, but that's a whole other story, and not something I would recommend. Best wishes.