If it was brake fluid the light would be red.
It is probably the telltale lights for the ABS and DSC and should be checked incase the systems have failed.
An amber handbrake symbol means "the drive off assistant has failed". This is hill assist, and holds the car in place for a few seconds after the handbrake has been released. It's in the manual, page 51. And no, I don't know it by heart, I have a PDF of it on my iPad