Canuck is a term which is sometimes used as an insult in the US but within Canada it simply means Canadian.
The mid-western Canadian accent is one of the most widely accepted in North America and in the past many US national TV networks actively sought out announcers who had that accent because of its wide acceptance.
I may be able to coach you with that accent although my time is limited, I am also open to receiving written english for review and correction. My Skype handle is jaxhere. Please let me know here when you request that I add you as a contact.