Pet Shipping

Has anyone out there shipped their pet? I have to do it for the move and I’m so nervous. I am memorizing the delta website (the pet cargo part) so that I don’t mess it up at all. The problem is that this is something I absolutely can not mess up on! If I mess up I won’t know how to get the pets to Columbus. They can’t ride on our flight because Southwest does not do pet shipment. Please let me know of any advice anyone may have. So nervous! I will be at our vet next Monday so I am hoping that they will have some advise too.