"I'm reading to my newborn but I'm not sure they are getting anything out of it? Should I continue?"
Yes! It may not seem like your newborn is getting out of the reading but their brain is taking in everything that you say. They are building connection in their brain. They are listening and at some point they will look at your eyes and smile at your voice. They will start to talk (coo) with you and let you know that they love your voice.