Don't worry Liz, it does come naturally. I have 2 girls and even though my oldest is now pregnant herself (20 weeks), I still remember. Labor sucks but soon after you forget how bad it was. Most women swear that they won't ever do it again, but they do. When you hold that beautiful baby in your arms, it is all worth it.
Breastfeeding class is a new thing. Probably not a bad idea since it can be very frustrating. And since my kids got teeth at 2 months old, it would have been nice to know what to do.
Good luck. My best advice I can give you is to ALWAYS trust your instincts. If you think there is something that doesn't seem right, fight for it. Sometimes doctors act like women (especially first time moms) don't know what they are talking about. There was a problem with my daughter and it took months before they would believe me. In the end (after a minor surgery) everything was ok but it is so upsetting when you know in your heart that something is wrong and they won't listen.
I am sure you have lots of friends but if you ever want to talk you can email me at laurenannpatrick at aol.