No need to work in Restaurant, even you have to, may be just little time. You have to go to school to re study English and wait the chance to get a better job. There are plenty of job here. Good luck.
How is your computer knowledge? I suggest you can learn some data management before you are leaving Hong Kong. I think you can find a job in some Chinese firm but don't expect earn a lot. I guess the annual salary will be around $25 to 30,000. You can go to get a associate degree in the community college when you are settle down in New York. You will earn more later.
Good luck