HELP WITH INSTALLATION OF BIG SUR

Laptop build :
HDD: 1TB HDD @ 54000RPM
CPU: AMD RYZEN 3 3250U
Current OS: WINDOWS 10
BIOS: INSYDE H2O UEFI BIOS
WIFI AND BLUETOOTH: Manufacturer-Qualcomm

I followed the Dortania guide. I was successfully able to boot into Recovery Utilities. But the problem is that, my internal HDD is not being shown in Disk Utility. I did enable "Show all disks", but no luck! It would be great if somebody can help! I know that AMD Laptops aren't supported and even if I manage to install it, there will be no GPU acceleration as it's an iGPU. So, it will be really laggy. Still, I want to do it.

submitted by /u/Own_Guava_2100
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