It is a big buddy system. ALWAYS ALWAYS ALWAYS keep a posative attitude even if you don't like who you are flying with or flying for. Like the airlines, Anything you say to another pilot is fair game. Do a good job, listen to the Captain, and keep a good attitude, you'll do fine.
Also, with your time and experience, you'll probably get put in some difficult circumstances with weather and fuel. I have seen it, speak up if you don't feel comfortable, and don't let your lack of experience get you bullied into a bad situation.
Now, go out there and have fun!!!! Dammmmit