I’ve had all three (TN/H1/PR). The most straight fwd one is TN-1 status. Since they’ve extended the length of the TN1 to 3yrs it makes it more attractive compared to H1B and doesn’t have the 7yr cap associated w/ the latter. Assuming you’re graduating from Carleton/UofO you’ll have a Degree and job offer letter you’ll have no problems since you’re on the Trade Nafta list.