What should I do? Whenever I try to render this thing(which is an intro for my youtube channel), I only get the background. The other part goes into the unknown to somewhere named users/keith. I know this isn't on my computer because it doesn't have a C: before it and I search my whole computer for it. Also, this is a demo version. That might be it but I don't know.
Your explanation doesn't make sense. AE only renders the Active Camera and if you are up-to date and have you composition set up properly it will render properly. Please at least go through the third section here on rendering. Basic Workflow.
You've got to know the basics or you will never get anything to work the way you expect it to.
And, if you don't understand things after going through that, you'll need to explain in more detail. A screenshot is worth 1,000 words.