A job opportunity at the Library

A job opportunity at the Library 17M, I work at a library starting in November but I fear I’ll fuck it up or maybe I’m just insecure. Lately I’ve been using Apple notes and showing people what I want to say and I’ve already said here it’s because of my fast typing and if not notes than Apple’s Text to speech. I feel like I might give people the ick especially if it’s a library in my school people might get pissed when I can’t verbally tell them where a book is so maybe they’ll complain. I know I still have a month before I actually start but I’m scared. Has anyone had a similar experience or any tips let me know