First Person to VR

Hi, I hope this is the correct place to post this question.

If one already has a game in First Person format, how difficult is it to convert to VR? There are quite a few games that have both options, but I wanted to know the feasibility in practice.

Thanks in advance and pardon my ignorance.

That depends on interaction. and locomotion systems from the fp game
but its very possible, but you would need to focus on how you are interacting with the world and its items from a VR perspective.
and how to prevent players from putting there heads through walls and cheating

Thanks so much for your response!!