Haha, you'll be fine. I took no classes. It will all come, don't worry. May help with pushing if you ask for a mirror. As soon as I got a mirror I was able to get my daughter right out. I wouldn't worry.
More and more mothers are opting out of birthing classes. I didn't take any either, I just pushed when they said too. Having a baby isn't really all that hard. Don't worry mama.
I did not went to any class or get any baby book, I just went with the flow lol.
I have 2 sisters and neither one took classes. And I won't either. Only 1 sister read the book. I think you will do fine.
You're body/dr will know what to do. Don't worry. With my first they told me how to push productivity and everything. It's gonna be fine. Congrats!
There are plenty of websites that can teach you breathing and relaxing techniques during labor. If you are worried, search for them.