I've been amateur voice acting for nearly 3 years and am a member of Voice Acting Alliance... one of the largest forums on the web for amateur voice actors. I work for the radio station on my campus at school and I have been in a number of productions for anime fan dubbing. I've also had stage experience so I can do some acting.
I didn't really have any proper training. No one taught me how to be a voice actor...but just by watching so much anime over the years, I've developed a knack for it. Also, as for speaking into a microphone and having excellent vocal skills, I learned that from reading books out loud onto a recorder when I was little. I've trained my voice not to shake when I speak unless it deems fit for the role I've been asked to do.
I've helped in casting and have done vocal judging for projects other people have hosted on VAA. I know, nothing extravagent. But I am only 18 (19 in a few days)!