This is such an excellent video for a writer to get an idea of what traveling through space, at the speed of light, might be like. However, there is a paradox here. If you were traveling at the speed of light, you would not have a concept of time or speed; but as a writer, you are trying to describe it.
What put things in perspective for me, was at the 8:23 mark, when Earth and the Moon come into play. That, you can write about. The rest is so abstract, but gives you an idea of just how vast the universe is. Light seems slow in comparison.
Click on the image below to play the video and sit back for 45 minutes.