Everyone starts out with colostrum and then when the baby is 3 days old ur breasts get huge and full. Good luck with breastfeeding! I just started doing it too
Mine don't leak at all during pregnancy but I nursed my first for 13 months. Leakage isn't an important factor.
No your fine milk don't come in like 3 days after you have the baby. With my first I started leaking a day after I had her.