I want to know what's the best age to have my first baby

When you are old enough to handle the financial, social and health problems and responsibilities that come along with motherhood. When you are self sufficient and best case scenario "in a healthy married relationship"

18 - 30 most fertile
30+ harder to conceive
40+ may need help to conceive

When you are financially stable and emotionally ready to put someone else before yourself

Well, I'm 30 and this is the perfect age for me.

I'm married and we both got through college - those things were very important to us before we started a family.

Ideally, think of how your baby would want to come into this world. That's your answer.