Can't reinstall mac OS at screen mac OS utility

Hardware:

• CPU: Ryzen 3 2200g
• GPU: Gigabyte RX 570
• RAM: 16GB Hyper X kingston bus 2666
• Motherboard: Gigabyte A320 (chipset a320)
• Ethernet card: Realtek RLT8111 ( I take that from page of gigabyte)
• Wifi/BT Card: Intel 3168 AC
• macOS version: Catalina 10.15.5
• What guide/tool followed: OpenCore 0.6.1

Link to guide i did

• What part I got an issue with: Screen to mac OS utility

This is my file config i created and using now

Hi all, I got a problem when i install mac os catalina. Hope to get help from all of you. i'm not good english much, but i will try to explain all of my problem below.

When I boot to screen mac os that give me 4 option to choose: disk utility, reinstall, help and restore, but when i click reinstall that system notify you dont have internet to install ( i was insert from my efi for ethernet card from RLT8111). I dont know how to solute that thing. This is the first time i come to mac os. Please help me. Thanks all