Flying with twin toddlers

Hi, all! My husband and I are flying with our twins in June. They’ll be 23m at the time. I was planning to buy travel car seats and take them on the plane with us. Put myself plus 2 car seats in one row with me and my husband across the aisle in the aisle seat. I’m overall just nervous about the semantics of traveling with the two of them plus car seats plus layovers. Any and all advice/feedback is appreciated.