One of the things that shocked me most about being a new mother was how difficult it was to find time for myself to do basic human tasks, including eating and drinking. Eating enough calories and drinking plenty of water is so important for both overall health and weight loss. And it's doubly important if you're breastfeeding! So, in those early days of parenthood, be sure to discuss your calorie needs with your doctor.
Personally, to make sure I was consuming enough calories early on, I used the WW program. It's easy to follow and doesn't require a lot of time to input foods (so many meals and ingredients are pre-loaded). I also loved that there was an option to mark that you're breastfeeding — either exclusively or partially — so that I never had to worry that I wasn't getting enough calories. Using this program was definitely an easy way to transition into a weight-loss mindset and also ensure I was getting enough to eat.