What are the requirements for immigrating to the United States and Canada through relatives?

Relatives can't help much in the matter of immigration. Because the reunion immigration program is only applicable to husband and wife reunion and parents taking refuge with their children. Brothers and sisters are not allowed to do reunion immigration, let alone relatives.

If your relatives can find an employer for you in the United States and Canada, you can apply for a work visa first, and then apply for an experienced immigrant.