Can’t get Clover installed on my HDD

I’ve been working on turning my Dell Optiplex 3020 SFF (small form factor) into a hackintosh. So far I have High Sierra installed, graphics working and audio working. Everything seems to be working great apart from the sleep issues I’m having and not being able to boot without the USB drive. I have an EFI folder on my hard disk but I don’t think I have an EFI partition. When I go to Disk Utility and try to partition the drive, I can’t because the partition tab is grayed out. Any help would be appreciated. Thanks in advance!

System Specs: Dell Optiplex 3020 SFF, 8gb ram, 1tb hdd, Intel Core i5 4570, Intel HD Graphics 4600

submitted by /u/Deaven9173
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