Lots of nurses are shy and introverted. As long as you can connect with your pts and are communicative with your instructors and classmates, you don't have to be the life of the party.
School will teach you how to not make life and death mistakes. There are endless protocols, guidelines, and safety nets. You will be taught all of them and you will practice them more than ever wanted.
If you are excited to start the program, that should be enough of a call for you. To this day, I'm still scared of sputum and poo. It will keep you from getting it on your scrubs
It's only a matter of time before you start talking about a nasty wound during dinner or eating off a bedpan from the supply room because there were no more plates during your thanksgiving shift. Before you know it, you will see enough sputum rockets flying 6 ft out of trachs, and all you will do is duck and carry on like nothing happened.