Is there ever a perfect time to have a baby and how do we handle pressure from family?

My fiance and are on the same page about wanting kids. We are not actively trying but are not doing anything to prevent it from happening and basically leaving it up to chance. Everyone is asking when we are going to have kids and when will we give our parent grand babies. I feel like my biological clock is ticking and would rather have babies sooner rather than later. Family keeps saying wait till I graduate with bachelor's and it will be easier and perfect timing. Well is there really such as thing as "perfect or right" timing for kids? What is the best way to get family and friends off our backs after telling them we are not rushing but want kids, but we are also planning our wedding?
Is there ever a perfect time to have a baby and how do we handle pressure from family?
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