@MaLd0n I really appreciate the reply, but I am not sure I followed it :). Do you mean I should try installing Catalina (since, as far as I know, Big Sur cannot be installed via the recovery method as it is a beta) and updating to Big Sur? Also, what do you mean by a good EFI folder? I made mine myself, but I'll try to redo it. I followed the Dortania guide and will give that one one more go and then maybe try the tutorials in here :).