Hi! Welcome!!
I'll try my best to answer some of your questions. But before that, I'd like to ask your intention of going to Canada. If it is to do a course that will eventually lead to a working visa and staying in Canada after your studies, I don't think the 7month caregiver course qualifies you for a postgraduate work permit. It states in the CIC website that you are only eligible for the PGWP if you completed a program of study that lasted for at least 8 months. Please refer to
http://www.cic.gc.ca/english/study/work-postgrad-who.asp
without a PGWP, you may only stay in Canada for the duration of your studies unless you receive a working visa (may employer na mag sponsor sayo which is mahirap din in itself, so you do need a postgraduate work permit to be able to work after finishing your course, pero depende din yun sa length of studies mo). I suggest you call up that school and ask them about this kasi baka mamya magbayad ka na tapos di pala eligible. Sayang pera mo, uuwi ka nyan after ng course mo unless makahanap ka ng magsponsor ng work visa mo at magawan ka ng visa before mag end yung validity ng study permit mo. (Note: seniors please correct me if I'm wrong)
Yes, your relatives may sponsor your studies in Canada. There is a list of requirements in the CIC website detailing the financial documents they need to provide, like bank account statements dating 3-6months back, income tax returns, payslips or business permits, etc. plus proof of your relationship, birth certs or kung ano man, and a letter or affidavit of support from them na sila talaga sasagot sa gastusin mo sa Canada.
Unfortunately, while the student visa route could be one of the easier ways to get to Canada, it is also one of the more expensive. I paid around 15k CAD for the 1 yr program I enrolled in. Tapos have to consider pa living expenses, school expenses. Etc. I don't know of any 1 yr courses that are not at around the 13k+ CAD range. So pag isipan mo maigi. This is a big investment!
Good luck!!! God bless and I pray for your success!!