Printing shipping levels from Etsy is super easy. Just a few clicks and you are done. I was nervous too at first since I did not know what to expect, but after printing that first one, it is a piece of cake. And I love that I can print labels for priority flat rate padded envelopes.
Once you click the "print shipping label" you will be taken to a screen to select the shipping service and enter the package weight. You can also add signature confirmation on this screen too. If you are over you shipping budget, you will receive a message at this point regarding that. If you need to modify your return address, you can edit that there also (mine defaulted to my name and I changed it to my business name).
Once that data is entered, you hit a button to confirm your label and a confirmation screen comes up with your cost shown based on the service and weight. Then you purchase your label. Once purchased, click on "download shipping label" and a screen will pop up with the printable shipping label.
You will be emailed a receipt and your order is updated with the shipping information including delivery confirmation/tracking number.
Hope this helps.