I started at my current postpartum position almost two years ago. I oriented at the same time as four L&D new grads (I am not a new grad). Of the four, one quit the hospital outright, one quit L&D and came over to us, and the other two are still hanging in there, but they said it was really, really difficult.
We work in a large urban hospital that does just under 400 deliveries a month. My coworker who switched to postpartum said that in L&D she felt like she was under so much pressure that she was constantly stressed and couldn't enjoy the job or even learn as well as she might have under calmer conditions. She LOVES postpartum. We are certainly busy. There are nights where we run from the beginning to the end of the shift. But the adrenalin factor is not nearly as high as it is in L&D.
I'm sure there are many new grads hirees who eventually do fine, but it seems like a rough road to be learning nursing in general at the same time as you're trying to take on any high-intensity specialty area. It takes a certain kind of personality and a supportive team atmosphere and the committment to be totally absorbed and exhausted for about your first year. It can be done, but you have to count the cost and see if you're willing to pay the price.
If you work in one of the other areas, mom/baby, well baby nursery, antepartum, etc., you have a chance to learn time management, hospital policies, patient interaction, and many other things you only got a taste of during clinicals. Then when you have a chance in L&D, you would be free to concentrate on the unit-specific information. Kind of like doing the academic portion of nursing school before clinicals so you're not overloaded.
Whatever you choose, I wish you well.