Congrats! and don't worry about the landing, it's nothing to be anxious about. Bring the COPR + passport + B4 if you're importing anything. When you arrive at the immigration, they will either complete the process right there, or most likely take you to a different office. The officer will ask you a few things: are you still married? address in Canada? and go over the info on the COPR to make sure it's correct, then he will sign, and you'll do the same. Make sure he also stamps and signs your passport, as you will need the stamp on your passport to get your SIN from Service Canada. It seems like you're going back to work right away - good timing!
It will all go fine - it's normally a very easy and friendly process
Sweden