Okay, I got some news - I managed to get my installation done (it used to be stuck at 15, then at 13 minutes before) and it's booting now, too. I will just send in a few screenshots of what has worked for me (don't know if it will for you).
These are the drivers and kexts I was using:
View attachment 400580
In order to modify them I used the
Clover Configurator:
An easy to use Mac OS X application designed to help you create custom configuration files for the Clover EFI bootloader via a streamlined graphical interface. Vibrant Edition (>10.10) v4.42.1...
www.tonymacx86.com
These were the drivers I activated:
View attachment 400583
When installing, my USB stick was connected via USB 2.0 (obviously), but one thing I also activated before installing was the
USB Ownership and the
USB Injection under
Options > PCI devices in the bootlader:
View attachment 400586
As mentioned above, before installing the OS I actually formatted the hard drive to
APFS, not Mac OS Extended (Journaled).
The installation took about five minutes, then the system rebooted. Now, normally you would boot into the partition that reads
Boot macOS Install from Mojave, but that's exactly where the installation would get stuck at 13 minutes for me. Therefore I instead continued the second part of the installation using the partition
Boot macOS Install Prebooter from Preboot:
View attachment 400587
And this really did the trick for me. The installation continued at the infamous 13 minutes, but then continued all the way through. And now I can also boot into the installed OS after the installation, without the boot getting stuck at 100%.
Hope this might help.