As one who has been thru divorce, I think I can give a bit of advice…
First is to marry only when mature enough. Although most 18 year olds think they are mature, they arent ready for married life and the responsibilities and lifelong committment that a marriage requires. Most 18 year olds will be very different people 5 to 10 years down the road.
Next is to KNOW your intended, their hopes and dreams, their wants and desires, what they want from life. Does it mesh with what YOU want?
These questions cannot be answered in an immature way, not that I’m accusing all 18 year olds of immaturity, I’m just saying that the life plans and desires can and do change with age and experience.
Once there are children, you cannot take your own desires of life into consideration because they no longer matter at least not nearly as much as your children and their needs matter. And children need BOTH parents and all that each can give them. So be sure, like I was!