Flying with my 1 year old.. any tips?

Isle seat is a better pick in your case and you mentioned the reasons yourself. Make sure you have easy access to milk bottle or the baby food you feed. And the most important thing is to RELAX and STOP BEING NERVOUS! 2-3 hours is nothing. There are people doing the same but traveling over 20hours around the globe. So just relax, be confident and enjoy the flight.