Hers is my two bits:
I have heard that a block heater is quite beneficial at temps below -10. It helps the motor warm up faster, keeps the oil a little thinner making for easier starts, puts less strain on the battery.
We use them, even in our (unheated) garage when the temp drops below -10 (in the garage).
You can get timers (try Canadian Tire) that will turn the block heater on when you want it to, same idea as an outdoor light timer for Christmas lights only can handle more power. Set for 2 hours before you normal start and the car will be very happy!
On the install note, when we moved from the west coast to the interior of BC, we had the local GM dealer install a block heater in our very used Corsica. It fell out the first time it went on the highway and the dealer would not warranty it. We have not been back there since. So make sure if you get one installed, that it is a reputable mechanic and there is a warranty.
Welcome to the forums, there are no “dumb” questions; maybe some “dumb” answers

. Hopefully you will keep coming back with your questions.