Before you go on a test drive, I would go through the videos if you haven't done so yet.
https://www.tesla.com/support/Model-3-videos
I would probably go through some additional videos on the touch screen and voice commands.
https://www.youtube.com/c/CfTesla/videos
Are voice commands a requirement for driving Tesla?
And disappointed that there's no heated steering. The newer long range m3 would work ok in the winter for us otherwise (ignoring the price)
Well it looks like you will get a heat pump but no heated steering wheel yet. Enjoy your test drive.
https://www.bing.com/videos/search?q=tesla+voice+command+video&qpvt=tesla+voice+command+video&view=detail&mid=F9F60E4FFBB435C21D93F9F60E4FFBB435C21D93&&FORM=VRDGAR&ru=/videos/search?q=tesla+voice+command+video&qpvt=tesla+voice+command+video+&FORM=VDRE
Voice command list
https://docs.google.com/spreadsheets/d/1v4m7aHk__KdfkoedDsiChxilbTvSg9AkV3J1quU0iRo/edit#gid=0
I like M3, but Ontario roads are not really good and M3 is pretty hard on the bumps. Or maybe I am just don't have enough experience with this car?..
personally I would just walk away if it seems uncomfortable.