After 1 month around First week of april you will get a message about receipt of your documents sometimes it takes more days depends on the volume of files. if you want to make sure you can also call on this number 514-864-9191 which is quebec immigration number they ask your caq file number to check your status,I have checked.. And last time , they open my file on 4th march.
For me it takes around 1.5 month to get CAQ.I already lives in Montreal, Quebec.
If you have any doubt you can ask me any question
Thankyou.