i cannot update to ios 17.5.1

i have an iphone 11 that i’ve had since early 2022. i have 64GB storage and right now my storage is at 38.1 which is including the update as it takes around 5.86 GB. I am able to download the IOS 17 Public Beta for it but whenever i go to ACTUALLY install it, it updates for a little before turning back on like normally and then i have to redownload the update again because it didnt finish all the way through. can someone let me know what this is?? do i not have enough storage??