When I took my CNA course, I was just as nervous as you are for my first day taking care of residents! I felt like I had no idea what I was doing! But just remember that you can ALWAYS ask questions! That's what your instructor is there for. Just relax, get a good night sleep, and don't freak out! Because the truth is, you will make mistakes. We ALL do. Its how we learn! My advice to you is to be alert when you're on the floor! Always knock before entering a resident's room, when ever you leave their side - LOWER the head of the bed, make sure their side rails are UP when you are not next to them...These are things that can get you in a lot of trouble! Take your time and don't rush. That's when simple mistakes happen. Bring 2 pens, a small pad of paper, and smile
You'll do fine! Good luck!