You where a human that lived in earth. You did human things and you are human food. One day a you found ancient ruins that you could tell was a big circle. You deside to put the circle together again and it made a portal to another planet. After you went through the portal you realized it was only a one way trip, there was no way back. (thank goodness the planet had breathable air)

Now to begin just say something like, I look around or what does this planet look like.