Opencore dual boot. First steps?

I have a successful build of Mojave running on my system with opencore. I’d like to be able to boot into windows as well without too much difficulty. Every time I run the installer for windows it ends up failing at some point (furthest was about 70% through install before fail). How should I go about installing windows so I can either choose startup from bios, opencore, or boot camp utility?

Build 9900k i9 Gigabyte auros z390 pro WiFi Vega 64

submitted by /u/Holocet
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