This isn’t 80 years ago and no one is asking for advice for their grandparents or great grandparents,
Everyone was NOT married at 18 back then.
My parents were married 79 years ago, he was 22, she was 21 .
My paternal grandparents were married in 1919, he was 24, she was 20>>>they waited until he returned from the US army, drafted to serve in WWI
My maternal grandparents were married in 1920, he was 24, she was 20>>>they waited until he finished medical school.
All of these marriages took place in NYC, all of these people were born in NY.
The last marriage in our family that had a chasan or kallah 18 years or less occurred in 1856 in Suwalki…they left for America in 1872.