Hackintosh Help with iGPU Acceleration, iMac 19,1 or 19,2 for my setup?

System:

• CPU: i5-9600K Coffee Lake
• MB: Gigabyte Z390 M Gaming
• RAM: 2x8GB DDR4 3200
• GPU: Gigabyte Radeon RX 560 4GB
• NVME (os drive): Samsung 970 Evo 500GB
• SSD (fast storage): Samsung 830 128GB
• HDD (slow storage, time machine): Seagate Barracuda 1TB 5600RM HDD 2.5"
• PSU: Cooler Master Masterwatt Lite 500W
• Case: Cooler Master Masterbox Q300L
• OS: macOS 10.15 Catalina
• Displays: 2x1440p (144hz & 60hz) Monitors both connected to dGPU via Displayport & HDMI
• Keyboard: Corsair K60
• Mouse: Logitech G502 RGB Hero

So I built my very first hackintosh over the weekend using this guide and I believe all is running well except for the iGPU. I selected 19,1 as I believe it was the system that mostly matched my build. After many many attempts I was able to finally get iMessages and Facetime working by simply calling Apple(lol). Anyway, the last thing for me to fix is iGPU acceleration. Should I have picked 19,2 instead for this to work? In addition, once I change it will I have to call Apple again to fix my iMessages?

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PS. Also, at the moment I'm using my monitors speakers for sound but the volume rocker when I go to adjust the volume via my keyboards volume wheel displays a stop sign. This doesn't happen when I use my headset for sound.