No worries! You'll be fine. Clinicals are time spent in various health care facilities where you put your newly learned skills to use.
I don't know if all schools are pretty much alike, but as for the LPN school I went through, we had a lab class where we learned the various clinical skills, first out of the book, then on each other or using "dummies". We had to be checked off for the skills before we could use the skill during clinicals.
My first round of clinicals was at a nursing home. We did assessments starting off with separate systems (integumentary, muskuloskeletal, respiratory, etc), we of course did vitals, and we did lots of concept mapping (learning how to group disorders/diseases with particular symptoms and putting together the pieces of a puzzle, if you will. Quite probably the thing that will be most accentuated is teaching you how to use the nursing process in absolutely everything you do. You will see this ALOT:
- Assessment (of patient's needs)
- Diagnosis (of human response needs that nursing can assist with)
- Planning (of patient's care)
- Implementation (of care)
- Evaluation (of the success of the implemented care)
If you get a handle on that before you start school, you can impress your instructors and classmates alike!
Good luck to you!