To all of the naysayers surrounding you...when they begin telling you how hard it will be, my advice would be to reply sincerely, "I know it will be challenging and it will be worth it in the end." Why would anyone want something like a nursing program to be easy anyway, this is a profession that should offer a challenge when training.
If these same individuals keep bringing you down, even with the slightest snarky comment, I would weed them out of your life, you won't have time to deal with their negativity anyway
Clearly the admissions committee thinks you are highly capable, as you were one of the lucky 23! (Come March, I hope to be able to say that I was chosen as well...)