According to our current understanding of physics, it is not possible for an object with mass, such as a human, to travel at the speed of light. As an object with mass approaches the speed of light, its relativistic mass increases, requiring an infinite amount of energy to reach the speed of light itself. This phenomenon is described by Einstein's theory of special relativity.
However, let's assume for the sake of speculation that you somehow manage to travel at the speed of light. In this scenario, several interesting things occur due to the principles of special relativity. One of these effects is time dilation, which means that time appears to slow down for the moving object relative to an observer at rest.
From your perspective, if you were traveling at the speed of light, time would appear to stand still, and therefore, you would not experience any changes or events, including seeing darkness or getting hit by something. From the perspective of an observer at rest, they would see you frozen in time, effectively becoming an image of light. However, as you approach the speed of light, your relativistic mass would become infinite, making it impossible for an object with mass to exceed or reach the speed of light.
It's important to note that these hypothetical scenarios are based on current scientific understanding, and the behavior of objects at speeds approaching or equal to the speed of light is still an active area of research and subject to ongoing study.