need a efi

Hey there! so basically I've Been trying to follow guides to make a opencore bootloader and i've done all the steps.
i first followed a youtube video then used the open core guide. neither of that works so i would be pleased if any one could make a lil efi and provide post installation instructions aswell, feel free to ask about my hardware but generally i have a intel NUC. i just gonna add the image from the intel driver tool