Make sure you watch the video before and while you’re unboxing. Below is the video I watched. On my particular machine, it was hard to see the voltage switch to switch it over to the appropriate amount for the United States. I used my cell phone to take a picture to verify that it was set to the wrong voltage and used a screwdriver to switch it over. In this video, I was a little confused about what to do with the filament holder since mine was different. Other than that, this video was great.
FlashForge has their own unboxing video. You can watch that as well.