hi maricar. you are qualified to apply as live in caregiver, with your work experience in hk, the question is if your aunt is qualified to sponsor you.
to be qualified she should offer you a job that either takes care of children, seniors, or disables person. she should provide you with room accommodation and financially capable to pay you. to start she should apply for positive LMO in service canada.
as for your qualification. you should have at least 72 units from university or college.
you dont have to ask help from the agency, you can always post your question here in the forum.
for more info check this
http://www.cic.gc.ca/english/work/caregiver/apply-who.asp