You will be surprised how much nicer everyone up this is compared to some Americans lol
I thought the same when I first went into Canada on the Quebec side ans it was always a good experience when up there.
Just stick to the speed limits and if there is a cop on the highway in the shoulder, move over. I saw them chase someone down for not moving over other than that just enjoy yourself and don’t cause problems.
Like Sootie mentioned, make sure you try the poutine, it’s amazing!
Be ready for traffic if you are driving around the Montreal area.