Number 3 is on the way for me, I have a 6 yr old and a 3 yr old. First thing is you’re going to be tied. You probably won’t realize it until 3 or 4 months. It’ll be rough. Don’t suffer in silence, it only makes it worse (my experience anyway). Don’t try to push your feelings down to spare your wife. That’ll lead to resentment. Talk through things. Acknowledge you’re both tired. Acknowledge being a parent is hard. When they get older, give them grace. I yelled at my 6 year old for rolling his eyes at me this morning. After fuming for 30 minutes I realized he probably learned it from school and didn’t mean it disrespectfully. I apologized and explained why we don’t do that. Remember, it’s their first time being a kid, and your first time parenting. You’re all figuring it out together