As long as you come prepared (doing any homework/skills that was assigned prior and any patient research etc.), it is just a place to learn. Because you are a student, you aren’t expected to be able to know everything or do anything perfectly. You will have a preceptor who is responsible for being a resource if you need anything at all. Hope you will have good preceptors!
If anything, the time commitment is the biggest thing. Sometimes you will have clinical for 12 hours at 6am on a Friday when you might rather sleep in. But that is what you signed up for! Good luck, it can be fun too!
Yes nursing clinicals can be very challenging. Every few weeks (or months), you are at a new facility learning something new. The most challenging part for me was making sure I was prepared well. Usually you have to get there pretty early. Instructors are big on punctuality so you should get enough sleep the night before. You also typically have to complete assignments each week in preparation for the clinical (careplans). You have to be very courageous. Many times I was too scared to volunteer for bedside skills so I would let my peers have the opportunities unless my instructor forced me to. Sometimes I would even hide out in the restroom for a while. It was tough for me. The good thing is, your instructors are always there to help and the nurses at the facility are typically nice enough to show you things (some aren't though, and that's another challenge). Turns out that this shy nursing student actually became a clinical instructor. Funny how life works. Congrats on becoming a nursing student!
Best of luck