@SocialWorker and I have a slightly different motherboard. We have the "Pro" and this is the "M", but my steps would be similar. The Clover/Unibeast install only worked with Mojave because of iGPU issue (though it might be possible to make it work), and I started fresh with OpenCore seeing that as an easier way to troubleshoot. Since the "M" has a DVI and HDMI slot, the framebuffer entries will be different and will require testing before going to Catalina for either Clover or OpenCore if using Whatever green. I recommend following the BusID guide on the official OpenCore manual.
Here is my guide