Rear trailing arm bushings shot. Tutorials? Can't find any.

Yaris almost exactly I would bet .

I personally have not had to do this repair. You have to push the bushing towards the inside of the car and out onto the floor and then make a thing that looks like a steering wheel puller that will push the bearing out and then pull the new one in all from the outside of the car pushing the bushing towards the inside of the car and into your hand or onto the floor and then pulling it from the opposite way to reinstall I don't think you could smack it in with a hammer because it's rubber If you were using polyurethane bushings You could probably use a wooden drift and a hammer and smack it in place but I don't think you can do that easily with the rubber although you might dry it when you have the parts in hand and the other one out spray a little light spray oil into the boar first and then offer up the bushing and see if you can smack it into place If not you'll need the puller

 

I would expect a Corolla's trailing arm and bushings to be extremely similar.

The job is so labor-intensive that the manufacturers try to use lifetime parts, and most people junk the cars without ever replacing them.

Good on ya for doing this one. I did it on an old Outback and it reduced squeaks and allowed a better alignment.

 

Just had mine done, had local tire shop do it. $150usd, I supplied parts from Rockauto for half the tire shop price, middle of winter here.