If the Earth was scaled down to the size of a poppy seed, the Sun would be about the size of a tennis ball and they would be about six metres or nineteen feet apart. On that scale, if the Sun was in London, the nearest star, Proxima Centuri would be in Rome. In the US, the Sun could be in Chicago then Proxima, Denver. Proxima is only about four light years away.
Our galaxy, The Milky Way is one hundred thousand light years across. The Andromeda Galaxy is two and a half million light years away and that's nothing on a galactic scale. Currently the universe is believed to be ninety three billion light years across.
Imagine you are standing on a beach looking up at the stars on a clear, moonless night. The Milky Way is so bright it casts shadows and there are so many stars it looks like someone has thrown caster sugar across the sky. Now think about this. There are more galaxies containing hundreds of millions of stars than grains of sand on the beach beneath your feet.