How to Make a Star Out of Just Oxygen?

To make a proper star, you need fusion. And it's important that it's hydrogen or helium, because tho tos are sort of the lightest element. To fuse hydrogen, you need a lower temperature than you do to fuse helium. So if you want to start a sun, you'd better start with a lot of hydrogen. You could evenu get oxygen fusion happening to make heavier stuff. That certainly is possible. Could that happen naturally? It wouldn't happen naturally Because, the amount of oxygen in the universe is tiny compared to the other in the universe. Most of the stuff in the universes still hydrogen. We've been burning stars for billions of years to make metals like oxygen