We can never know the answer to this question. Instead, we can hope to know what this 'first generation' of stars might have looked like. It turns out that many astronomers view this first generation of stars in the universe as being very important. First, unlike stars today, the only elements out of which it could have formed were hydrogen, helium, some deuterium and lithium. These were the only gases produced soon after the Big Bang.
As this gas clumped up and contracted under its own gravity, it tended to produce very big stars, perhaps 5 - 10 times the mass of our own Sun, or even more massive still. These stars lived only 100 million years or less before exploding as supernovae. This explosion took the gases within these stars, which had been cooked in the stars nuclear fires to produce the other familiar elements, and threw them back into interstellar space. There, this enriched gas cooled and collapsed all over again into the more modern generations of stars which start out life as a mixture of hydrogen, helium, carbon, nitrogen, oxygen, iron and all the other elements.
We do not think that any of these first generation stars exist today, except as the remains of ancient supernovae that occurred over 10 billion years ago. Their remains may be millions of neutron stars or black holes orbiting silently in the depths of interstellar space, waiting to be discovered by astronomers.