Hello! First of all, are u applying inland or outland?
Im applying inland, from quebec. After receiving the csq in paper, u'll get two copies: one says immigration, that one u need to sent it back to CIC, the other one you keep it safe (ur gonna need it for future quebec tramits, ex. Health inssurance.) for the open work permit, you first need to have get an AIP (approuval in Principle) usually comes after CSQ and in some cases, an interview) AIP is a letter that says that u can now send and app for work or student permit. If u are already in Quebec, with the AIP letter plus ur CSQ u can go request health insurance even before ur Permanent residence is confirm.
Hope this helps!!! Good luck and God bless!