Wanting a baby

My fiancé and I want a baby. We're 21. I'm finishing up school now and he has a good, full time job. My family is telling me to wait til I'm older, I'm too young to even get married let alone have a baby. I've MC twice and it made me excited when I found out and depressed when I lost them. My fiancé and I feel we are ready and want a baby, but my feelings about that get crushed when my family inputs their opinion. Anyone have any advice?