so let me get this straight, its booting into clover, but when clover boots it does not find the installer partition on the usb?
That is pretty strange.
Here's what I did off the top of my head:
0. Reformatted my installer usb. Completely cleared it of any data that was on there. If that doesn't work try another usb stick.
1. downloaded high sierra from mac app store
2. downloaded newest unibeast from tonymacx86 (make sure you get high sierra version)
3. Followed the tonymacx86 install guide for unibeast High Sierra, which is pretty straightforward
4. Downloaded clover configurator
4. After this, i had some trouble. This is why I took a little longer than I wanted to make the guide for this update. Since I installed apfs formatted, it seems "Efi Mounter 3" doesn't seem to recognize the partitions the same. Efi mounter 3 is a key part of my install guide so it threw me off. Luckily i *think* the efi partition of the drive is already mounted when you install unibeast. So I just copied the kexts like in my guide to the folders needed, and changed settings as needed with clover configurator. If it doesn't mount, just go with the first selection in the list, and if you see a clover folder you should be good. Otherwise you need to use terminal to look up what partitions are what and mount the efi partition of the usb drive according to what it says. type in "diskutil list" (without quotes) in terminal to see all drive partitions.
5. Once that was done, I continued on and clover booted the installer first try.