How soon can I start reading to my son. My son is two and I can’t wait getting started!

The earlier the better! Babies are much much smarter than we give them credit for. He may not understand the words yet but he'll learn how to associate the words with the pictures that comes along with it. You can come up with games like "Where is the apple?" and get him to point. Praise him if he's right. And since he's 2, read his favourite book a couple of times and let him finish your sentences. I did that with my daughter and now she loves reading!