All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ʻalayhi wa sallam, is His slave and Messenger.
If you can handle only the lawful requests and assist the clients to obtain them, then there is no harm in that and your income from this work is lawful. It is impermissible for you to handle the unlawful requests; Allaah, The Exalted, says (what means): {And cooperate in righteousness and piety, but do not cooperate in sin and aggression.} [Quran 5:2]
When the Muslim works in a job that involves both lawful and unlawful duties, part of his income is lawful in proportion to the lawful duties because deeming the income lawful depends on the permissibility of work.
Your intention to have your family move to Canada and live with you does not make it lawful for you to work in an unlawful job because this is not considered a necessity. There is no doubt that there are many lawful means of earning a living for whoever strives in seeking them. Needless to assert, whoever fears Allaah and abandons the unlawful for His sake, He will make for him a way out (of every distress).
Allaah knows best.