This is my first time putting Ubuntu on a USB, and I need help. Is it a straight copy from the download to the USB?
To put Ubuntu on a USB, you need to use a program to make a bootable USB from the file you downloaded. If you are running Windows, you will want to use Linux Live USB Creator. If you are using a Mac, you will want to see this article on the Ubuntu Wiki. Finally, if you are running Ubuntu, use the Startup Disk Creator program that it pre-installed.
For more information, see this guide on the Ubuntu Wiki: