Welcome! My daughter also lacked oxygen at birth. There is a great Facebook group called the beautiful faces of HIE that is very helpful. I'm not sure if your son had HIE, but generally with oxygen loss, it's a common diagnosis. In any case, I'm sure you'd be welcomed into the group. My daughter is on the more severe end, but if you have any questions, you can certainly ask!
Shauna, mom to Adrian, 8 and Charlie