How do I get invited to Canada and work as a caregiver?

Try asking the people here:

https://www.reddit.com/r/ImmigrationCanada/new/

Sounds like you don't live in North America. You will need to contact the Canadian government and ask what you need to enter their Country on a work visa. I would think you need the promise of a job and proof that you can support yourself or even have someone sponsor you.

This is a forum of caregivers sharing our experiences. We are mainly from the US but have members from Canada, UK and other countries. So not an employment agency.

This is not a jobs board, this is only a support forum for care givers and receivers. You may want to contact a labor department in Canada to answer your question.