https://aip.scitation.org/doi/10.1063/9780735421141_001
A light-year is equivalent to about 9.46 trillion killometres.
https://en.wikipedia.org/wiki/Light-year
so the average distance between galaxies is 1 million times 9.46 trillion miles. Then there are 100 billion galaxies. So if we drew a virtual line from anywhere e.g. planet earth, and extend it in any direction, there would be a massively further distance across the galaxies along that line, e.g. than that the universe is thought to be! - 13.7 billion years old.
So how old is the universe?
If we are looking at the age of the oldest light we can currently see, such to get the number 13.7, then that is surely a faculty of light. We can only look so far back into light before it becomes unpassable and uniform [background radiation].