Install Windows on your computer and buy and download 'Minecraft: Bedrock Edition' from the Microsoft Store (Might also be called 'Minecraft: Windows 10 Edition' or something similar).This includes all Nvidia RTX GPUs and at the moment all AMD RX 6000 series GPUs. Build or buy a computer that contains a hardware accelerated DXR graphics card.For simplicity sake I will just be providing instructions for both. The first thing we need to identify is 'what version of Minecraft are you playing' as this will impact the steps you have to follow. Here is hopefully some useful information:
