the easiest solution is to visit a local mechanic and for a very small fee have them do it. In Toronto Morty? Easiest?
In the time it takes you to cover your seats and make room for 4 tires; travel to a garage or perhaps a Canadian Tire automotive hell hole; leave your keys for the day or pace around for a few hours; and pay 40 bucks with zero expectation that the torque is correct and not more like 130 lbs; you can have your tires switched at your own home plus stain the deck.
However, you have one more thing to buy; a decent hydraulic floor jack. Canadian Tire has some good sales plus Deals or Princess Auto stores. Even sears on rare sales events might have something.
On the first occasion you will probably find that the nuts are on extremely tight. You might need a breaker bar or one of those T type tire irons to break them free.
Set parking brake. Break all nuts free on all wheels. Then lift one wheel up at a time and replace the tire. Snug the bolts up in a criss cross alternating pattern.
Torque nuts when car on ground and off jack. Remember to release pressure from torque wrench between uses.
Next step is to acquire a balance type tire balancer.
