I found out 7 weeks about that I have a 1.6cm AN. My kids are 15 and 12. I basically told them I have a growth on my balancing nerve, which is pressing my hearing nerve and that's why I've had such a hard time hearing them lately. They didn't seem too concerned because I was very matter of fact and no dramatic. I haven't told them yet about the radiation I plan on doing, but will once everything is worked out. They hear and DH and I discuss it. I put on a brave face with them for their sake. I went to pieces with DH and my parents when I first found out, but I 'm past that now. I told my very very good friends and am now being to tell just "friends". My Very good friends have listened to my fears and concerns and all the awful things that can happen. My "friends" just get the "benign tumor, going to zap it with radiation, will you pass the wine bottle please" attitude.
I do have a question for you since your AN is even smaller than mine. If hearing preservation is a major concern, which it is very much for me as my other ear has a hearing aid in it already, why don't you consider cyberknife? It seems you have that option, where others don't. Almost 100% non-growth of tumor, almost no facial issues and 80% chance of hearing preservation. There is so much information here to research.
I'm sorry you had to find this board like I did. However, you couldn't have found anyplace on the web better for information, and the people here are the absolute best. Good luck with your journey.