So I have a nephew now

My sister just recently gave birth on the 11th and I'm his aunt I'm so jealous because shes younger then me and I have no kids myself ( me and my man's been talking about it for a while and asking when we are doing it but we both in college and don't have time for a baby) but my point is should I bring up the baby thing to my man and talk about it more to have one soon or should I just keep quiet cause we both have college.