The first star that appears at night depends on whether the viewer is in the Northern or Southern hemisphere and the time of year. One star that might be the first to appear at night during the winter in the Northern Hemisphere is Sirius.
Sirius is a blue or blue-white star that appears to be the brightest star in the sky. In reality, many stars are brighter than Sirius, but it appears to be so bright because it's closer to the Earth. It is only 8.6 light-years away.
Sirius is in the southern sky beneath the constellation Orion, which is one of the easiest constellations to find.