Softball Mitt Questions?

I am trying out for my school softball team and I need some help with my mitt. I have been told to measure my hand from the tip of my index finger to the base of my hand/my wrist. I have done this and got 5 inches. (Yes, I am 14 but I'm EXTREMELY tiny). There are no REAL SOFTBALL gloves (like, not toy ones or tee-ball ones) of this size. Any suggestions? Also, my coach said to break the glove in, you wrap it around a softball with bungee cords and put it on the lowest setting for 3 hours, then take it out and crinkle it up for an hour, then repeat. Is this advisable? Please help!!