Is it difficult to get into neonatal nursing as a new nurse graduate?

Actually, in our area, both are almost easier to get into as a new grad. Both areas have extensive orientation and preceptorships. I'd call the nurse manager of a unit you want to work on and talk to her (or him ); if you're enthusiastic about working there, they'll probably give you a chance.

BTW, I started in the NICU as soon as I'd graduated, with a temporary license.

Starting out in the NICU as a new grad is the best way to go. Nothing to "un-learn", as opposed to experienced nurses who are used to caring for adults. New grads have a higher satisfaction rate and stay longer in the NICU than nurses who transfer in from adult specialties.

As a matter of practicality, most hospitals have more NICU openings than L&D openings, since NICUs tend to be among the largest units in the hospital. You will probably have an easier time finding a job as a new grad in the NICU than in L&D, but neither is impossible. NICU is an excellent "training" ground if you eventually want to transfer to L&D. I've worked both, starting in the NICU, then going to L&D about 5 years later. I never got the same "comfort" level in L&D and eventually went back to NICU. But that's just me.

Either way, find a unit with an extensive (classroom and clinical) orientation of at least 3-6 months. Insist on 1:1 orientation with a consistent preceptor, and an identified mentor for 6-12 months after that. Run from any unit that has less than 50% experienced staff (2 years or more on that unit) working any given shift. Ask to shadow and interview a staff nurse from the unit. Most will tell it like it is, and help you to get a feel for whether the unit will be a good place for a new grad to start.