Hi Sylvia, welcome to the forums.

If your daughter has Internet access, she's certainly welcome to stop by here to meet the gang and get whatever advice we collectively have to offer. Or you can post some questions for her and pass the resulting information along to her.

I don't know Singapore at all, but I have heard that nursing can be a tricky profession to relocate overseas. Nursing credentials don't always transfer too well to another country, and many countries have the requirement that medical personnel must speak (and be tested in) the local language. She may want to contact the Singapore Consulate in the US (they probably have a website) to find out about how her professional certificate will (or won't) be accepted.
Cheers,
Bev