Winning the lottery doesn't mean that you'll qualify for a green card. There's a secondary selection process. You have to meet certain categories for the embassy to accept you. You can find some more in-depth information
here.
I usually hate to bring people the bad news, but I still prefer doing it than lying and make things look better than they actually are: Your chances are pretty slim. But remember, that there are more ways to Rome than just one. And never ever give up. Good luck!