Windows Upgrade Help and more

Thanks! I made the USB, but when I try the system restore it says there are no restore points available. What should I do next?

Having major boot issues after trying to upgrade from Windows 10 to 11. The installation seemed to go okay, but now my PC just gets stuck on a black screen with a spinning circle. Sometimes it flashes a quick error, I think it said "INACCESSIBLE_BOOT_DEVICE" before restarting. I can't even get into ...