First successful Hackintosh - a few questions though

Hello everyone. Just finally Success fully installed OpenCore on my Hackintosh. The only thing is that I have an Nvidia GPU.

1.) I have no idea how to get iGPU working or frankly what the hell an iGPU is.

2.) I plan on getting an AMD GPU soon but once I do, how do I make sure my MacOS Hackintosh detects it and uses it.

System Summary (from windows)