Please help accept job in Canada

My family and I are from South Africa, I am a plumber trying to do the best I can for my family. But here in South Africa situations are on a decline at a rapid pace. I have a fear that there is not going to be much of a future for my children here. So I started to look at immigrating to Canada. I have already received a job offer from a company in Canada. But since the Corona out break, the South African Rand has been dropping, so I am battling to make ends meat and trying to save.

So I'm here asking for some help to give my family a fresh start in a country with better opportunities for my children.
I know its not going to be easy for me, but atleast I know it will be easier for my children when they need to enter into society.
I thank you in advance for your generosity.