Help with upgrading to Ventura

So I have a 27" late 2015 iMac that was running the latest version of monterey. I needed to update to Ventura because my adobe lightroom, photoshop, and camera raw were no longer supported. I followed Mr. Macintosh YouTube video on how to install Ventura on an unsupported mac. I followed everything correctly. I partitioned a usb flash drive and put ventura and my old monterey on it just incase things went wrong. Everything went semi smoothly. I have everything up and going, but I can't connect my icloud. I'm logged into my apple ID. I can login to my icloud online. It says that I don't have permission and it says the same thing when i try to get into my Google drive folder. I also tried to restore my backups from time machine. I tried to add it to my Macintosh HD and it gives me this error an unexpected error has occurred error code -8062. Somehow some of my files got deleted off of my first time machine backup I did of my whole system before I started anything and a bunch of stuff got deleted from my Dropbox. I logged into Dropbox online and on my phone and everything but like 3 files are on there. I looked in the restore deleted stuff and nothing is there. I made sure everything was synced amd backed up. I'm not sure what I did wrong. Can anyone help? I also put my time machine backup on a external 2TB SSD. I've ran first aid in disk utility and everything came out good. And everything in opencore is good. I just can't get into some of my stuff. I also noticed i had lost some files in my time machine backup so I'm running diskDrill to hopefully get them back. I also can't get into any of the folders in Macintosh HD- data it says i can't open because i dont have permission to see the contents. I attended some of the pictures of the codes and problems I've been having.