How do I get ready for my first day of work?

Im starting a new job as a pharmacy Tech. in a few days and I don't know what to expect. Im really nervous because i'm afraid that there would me some medical terms that i wont be able to remember.im felling a little insecure because i recently dropped out college and I'm not feeling too Intelligent at the moment and I don't know if i will be able to keep up. I just want to know what t to expect so I don't fell like a fish out water . Any advice ?? please this would really help me out i've been stressing about this for a a weak now. HELP!