Enjoy your marriage first

But if you choose the right person to marry, then you can have a really healthy marriage and it would be a good environment for children to grow up in (I'm not saying that's what you should do if you don't want to, I just wanted to reassure you) :)

My parents waited 9 years before having children. They divorced after 25 years. I really don't think the length of time before children has much to do with the success of marriage.

I think it does sometimes. Not all. But it's surprising that people can stay together for so long and then just split up.

Split ups don't come from nowhere. In my family's case, there were many years of failed marriage counseling and bitter fights first. On the flip side, I know couples who delayed marriage for a while and then had children within the first year of marriage. I also know others who had children before marriage. They are all going strong.