I will take out a bag of frozen milk, usually 4 oz one day before I need to use it and put it in the 雪櫃下格 to slowly defrost. Then when it is defrosted, pour it into a milk bottle and warm it in hot water or bottle warmer. You need to consume the milk within 24 hours after it has defrosted. If your baby cannot finish it, then you need to throw it away, since you cannot reuse the frozen milk that has been reheated already.
If you need to defrost urgently, you can run the frozen milk bag under warm water (I heard not over 37C), and never run it under hot water.
My baby will not need to drink more than 1 bag of frozen milk a day. Because when I am at work and after I return home, I will pump out, which can be put in the fridge (not freezer) for my baby to consume the next day when I am at the office. But I will have her drink one meal frozen milk and save one new bag in the freezer.
Don't worry la. All of us can do it, and so can you!
Of course, you should store milk if you have more than enough for your baby's immediate needs. If you store, you can have more options. For example, if you need to go on a business trip, or if you have mastitis (touch wood it will not happen to you) or any other reason you cannot feed for a while, if you have frozen milk then your baby will still have breast milk mah.
Some mami will feed and pump at the same time, but I have not done that before. But when I feel that my breast still have milk after my baby finishes eating, then I pump. And that's how I started stocking up the milk. And as your milk supply increase as your baby grows up, you will have surplus. Don't worry. I am not a 'rich' mother, but I now have around 30 bags of 4 oz milk in my freezer now.
I don't think there is only one single right or wrong method to pump, just as long as your B is well fed and then you still have surplus to build up your supply, it's fine. But I think you just need to ensure that when you mix the milk together, they are of the same temperature. For example, if you want to mix 1 oz (freshly expressed milk) into a cup of milk that is already in the fridge, put the fresh 1 oz into another cup, and bring it to the same temperature first before pouring into the other cup.
If they are more watery, may be because it is the fore-milk. You can mix with the hind-milk (thicker consistency), usually you will get that if you express milk AFTER you feed your B.
I don't think there is only one single right or wrong method to pump, just as long as your B is well fed and then you still have surplus to build up your su ...