Not the exact same situation here, but i immigrated to the UK from the US a few years ago now and here's some general tips:

• if you can, find a good immigration lawyer/solicitor to help you all the way through, they know all of the ins and outs of the process, so all you guys will have to do is collect documents, payment, ect
• if you've got a personal connection in Canada, ask if they can help sponsor/vouch for you guys, since it's another way of the gov knowing that youve got good character

And of course check Canada's government website! 👍