Your breast is never completely drained. The initial let down for a lot of women is an almost painful feeling in both breasts, usually after baby starts sucking, or if you are thinking milky thoughts when wanting to express, or when some random baby cries in the supermarket if you have norks like mine. The let down is when the milk reservoirs in your boobie fill with milk.
Baby initially gets watery milk to quench thirst, then the hind milk comes, which is higher in calories and thicker. It is best to keep baby on one boobie as long as they will feed to ensure they get the good stuff. If baby starts playing with that boob, offer the other too. Start the next feed on the boob baby had a little bit from. I.e the second one to be offered.
Baby will likely prefer one breast, get more from the one side, so that will be the better milker. With DD2 the left one gave up at about 11 months, so I just fed her from the right from them on.
I plan to start expressing soon blonder. Our kids are practically twins so I am sure you will be fine to start soon too. Start small and gradually the amounts will increase. Night time and morning is the best yield. I never express in the evening as you want baby to have as much milk as possible then, and your supply will be lower. I usually express 10 Mls off both, then drain them both once baby is settled after a feed. If baby decides they are still hungry, they will still get milk from you. Our boobies are constantly refilling if stimulated to do so. Sometimes quicker than others.
I asked DH soon after the birth if he still wanted to do a feed every day or so. He said no as he had too much to do already
he loved feeding the girls. I have never given a bottle of formula or expressed whilst feeding. Baby needs to know you only give milk from boobie, otherwise they could decide to go on strike until the easy bottle shows up.
I have rearranged the nursery this afternoon. I will be told off. I do not care.