It actually isn't normal to start learning magic as young as I did. I'm a bit of a special case. I didn't go to TSAB training facility, which is like a mage school, I was taught by my mother's familiar Linith.

I met Nanoha on Earth actually. She randomly became a mage by accident. Though you wouldn't be able to tell because of her natural skill.

As for my boss, that would be the person to talk to if you want into the library.