brand new series 9 apple watch won't update

i keep trying to pair it to my phone (iphone 13 pro max) and it says i have to update the software on my watch. so i do that and try and download it and it consistently says it's going to take 3 days to update... surely this isn't normal?? i have been trying to download it for a good 6 hrs now. is there any way i can speed it up and actually get it to download?? thank you!!!