If you have problems with leaking, cover them with a disposable breast pad. Some people advise putting on some cream or using a spray but this is not advisable as it interferes with the delicate balance of natural secretions. Wash your nipples once a day without using soap and keep them dry. Giving short feeds as often as your baby will cooperate in the early days will give you both practice. During these early feeds, your baby is getting not milk but colostrum which protects the baby from disease and helps her to excrete the meconium from her bowel.
Meconium is a sticky, black waste product which builds up during the time the baby is in the womb.
The actual milk comes in a few days after birth. This might be the second, third or fourth day. The milk usually comes in more quickly with second and subsequent babies, but this depends on how much sucking the baby has been able to do. The more you have been able to feed the baby, the more your breasts will have been stimulated and the quicker the milk will come in, although until it does, the colostrum will supply all that your baby needs. When the milk does come in you may well find that you are really 'bursting' and the process is rather messy, although giving the frequent, brief feeds from the beginning will also help to minimise the engorgement when the milk comes in.