1. be happy you didn't back into one of your kids
2. be happy you have a black car, a paint pro should be able to do wonders with his hands, paint and some special polisher (not possible on lighter colors)
3. painting the whole fender could be a problem, even black sometimes is difficult to match, especially when viewed in sunlight

Sorry to hear about your "encounter" but worst things could have happened, so don't worry too much.