How to purchase VR games?

Hello there, I'm curious about purchasing VR games. Could you please guide me through the process? Are there any specific platforms or websites where I can find a good selection of VR games? Also, do I need to have a certain type of VR headset to play these games, or are they compatible with multiple devices? Lastly, is there anything I should keep in mind when making a purchase, such as system requirements or customer reviews? I'd appreciate any information you can provide. Thank you!