What do you need for VR at home?

Hey there, I'm curious about setting up a VR experience at home. What are the essential components that I need to get started? Is it just a headset, or do I need additional hardware like controllers or a powerful gaming PC? Also, how do I make sure the VR system is compatible with the games and apps I want to use? I'm excited about the possibilities, but I want to make sure I'm making the right investments. Thanks in advance for your help!