Stuck on blank screen with working mouse

Hello reddit!

I need your help. I'm trying to turn my HP ProBook 440 G6 (i5 8265U Intel UHD 620) into my first hackingtosh.
I've followed the step-by-step guide from OpenCore.
After i select "macOS Base System (External)" in the OC bootloader the laptop boots into a blank screen with a mouse pointer.
The mouse/trackpad works fine. It even does the macos thing, when i shake the mouse the cursor it gets bigger.
But that is all it does. I spent the last two days trying to find a solution or even an hint to what the actual problem is but - no luck.

My best guess is, that it has something to do with USB-support but its basically just a gut-feeling.

Hopefully you guys can help me!

submitted by /u/Noopi
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