Always start here:
I Want to be a Voice Actor! - by Dee Bradley Baker
Once you've read through the above site, read this one!:
The Voiceover Collective 
Education, Equipment, you name it!! Everything you need to know about getting your feet off the ground in VO!
Another great site for the newcomer:
Get Started in VO
Wonderful Coaches that Michelle loves:
Sara Jane Sherman
Debi Derryberry