Her first day of work is very important to both employer and helper as you set the working requirement on her everyday job. What do you expect her to do daily? I would suggest you to set a house rules and working timetable so she can understand what you expect from her. But bear in my mind that, it really takes time for her to adapt to your living environment, to Hong Kong this modern City, your language. As your helper might originate live in a farm, she might not know how to operate a vacuum machine. Be Patient, and give her a few months to learn and gradually, her performance will meet your standard.