Your dog and her puppies will be just fine, whether you're there or not. In fact, you're so nervous about it, it would probably be better for the dog and puppies if you weren't there.
I'm curious, though. If you know nothing about breeding dogs, why did you breed her? Are you prepared for the expenses involved in raising puppies?
Before you can sell or give away the puppies, you should have them all vet checked to make sure they are healthy. You should get them their first puppy shots and have them wormed. If your dog is a mutt, congratulations, you've just contributed, albeit unknowingly, to the number of dogs that will be put to sleep as soon as their new owners get tired of them. And if your dog is purebred, then you'll also have to get her checked for any inherited genetic disease - and the male should be checked, too. They both should be OFA checked, and possibly Vetgen checked for heritary diseases and disorders. You'll want to present proof of these checks to prospective buyers.