recertification?

[UCPA2018]

I'm a 2nd year PA student getting ready to begin my elective rotation in dermatology, something I never thought I would enjoy however have fallen in love with it. My only concern is how does this affect recertification if you're in such a specialized area of medicine? I've been warned that new grads shouldn't specialize right out of school as it hurts your chances as expanding your experience later on in practice if you switch specialties and can affect your recert. Is there any truth to this? Does anyone have advice that they would be willing to offer? I would greatly appreciate it!