Switch to Aurora from an Arch based Linux was succesful.
I discovered that the installer wanted me to mark the /dev/sda1 as bootable. Otherwise, it complained. Then the blivet gui identified the partition as EFI and the iinstallation went fine without any accident.
Fortunately, I had been using “normal” Fedora for years privately and in my company. This helped me a lot because…
I got some permission errors (regarding to my data coming from previous Linux which of course was context-less) and in my mind the word SELinux popped up and shortly later the word restorecon appeared. Then I knew what to do to make me happy. 