1. Measure the width and length of the top of your ottoman, so you know how much fabric you need to cover it. Add a few inches to each side of your measurements to leave enough room for the upholstery foam and because the fabric will wrap inside the ottoman as well as beneath it on its base.
It takes up to 24 hours for a new refrigerator to reach the correct temperature. Avoid placing food or drinks into the refrigerator until it reaches 40 degrees Fahrenheit or lower. The freezer must be at 0 degrees Fahrenheit.
Open for that time likely didn't ice it up too much so it should still cool for you some right away. It depends on how full it is as to how long it takes to cool down. The more mass in there the longer it will take. I would give it at least a couple of hours before I started to worry about it. In fact it could go in to a defrost after running long and hard and that means it could shut down to defrost for about 30 minutes before it started cooling again. No, leaving the door open didn't break it. Give it time.