Before you do anything other than unboxing and checking to see that you received all the correct parts, go to Yuneec's website, in the Support section download the Owner/User Manual. Printing this out may help you study and refer to it easier, but in any event, keep it handy on your computer or cell phone.
Read through the Manual before flying your craft. Study it carefully and refer back to it as needed later.
If you have the H520, go here to download a manual Zip file.