It sounds like you’re nervous because you feel like you’re not good enough or don’t know enough. Remember that they brought you on knowing your lack of experience and new-ness to the industry. They know you don’t know! So don’t be afraid to say you don’t know! Go in ready to ask questions and honestly say I don’t know what that is or could you explain that. I’m sure people would love to explain a bit more about what they do and maybe begin to see what they do with fresh eyes. They must’ve seen in you a desire to learn and passion for the industry, that got you through the door, and the knowledge will follow. You may not know, but you will learn.