and I guess there’s a difference between a pressure cooker and a pressure canner....
Yes, there is a difference. The cooker you use to make a meal and it reduces the cooking time-but it is not sufficient to can food.
For that you need a pressure canner for low-acid foods. For Acidic foods, a water-bath canner is sufficient, and can be made out of any pan with a lid that is deep enough to allow a couple of inches of water to cover the jars. You can use rings or a trivit-jars must not be placed directly on the pan’s bottom.