Welcome aboard! Once you have the bug it's hard to shake! Pinside is a fantastic EM community where you can learn and enjoy EMs with other collectors. We try to help each other out as much as we can -- often helping with parts-needs or advice (no shortage of advice and opinions on here, haha!) -- and it's a great place to learn a ton.
I HIGHLY recommend you read this from one end to the other: http://www.pinrepair.com/em/index.htm
It's essentially the Bible of EM repair and you can't go wrong. Welcome to an addictive, fantastic hobby, and welcome to Pinside!
Mark