Congratulations on getting into the program! What a fun two years you will have.
The one thing I would have done differently would have been to jump on every opportunity to try something new, or find that opportunity. Don't worry about whether or not you know what you're doing, as long as you have a nurse or clinical instructor there to assist you go for it! That's why you're there, to learn everything that you can.
Oh man, the care plans! I used to think they were horrible busywork, implemented by the evil clinical instructors who were determined to make our lives as nursing students a living hell. Then I learned that they were actually pretty awesome. They help you understand disease processes and how the patient's symptoms relate to them, and they help you understand nursing diagnoses and why you do what you do as a nurse. Don't overlook their greatness!
Good luck to you, future nurse!