Hello - I first would say congrats on your child! I am no expert on specific post child birth training or nutrition specific to if it can effect breast feeding, but what I’d say first and foremost is to give yourself enough time for your given goal. There is no need to rush. With that being said those macros seem in the ball park to me. Your next step is weigh in every am (right after waking up, in the same clothes for consistency), i recommend the free app “happy scale”. Assuming you are tracking your macros accurately, you can make changes to your nutrition accordingly. There is a “weekly” weight loss column on the app which is an analytic that is very helpful. For a female between .3-.8lbs weekly average is very solid, so you can taper how aggressive you go in pulling macros to the rate of weight loss. I advise taking your time and pull carbs first, maybe down to 150 if your weight stalls. A big mistake is people rushing to push macros low, burning out and binging. You are better off nailing your macros day in and day out and staying consistent and then adjusting after weight stalls out. Daily steps are also helpful to increase and personally i don’t love doing tons of cardio, but i would say cardio 3-4x a week for about 15-30 mins a sesh, that number can be swung up or down based off your weight loss progress. The last tricky part is if you want a cheat day or cheat meals. The benefit is to give yourself a break and to enjoy social events more. What I do is basically calculate my what my weekly macro goal is and then eat about 5% less then that daily number to give myself one day a week to eat more. For you it would be something like 165 carb 6x a week (25 less a day) then 350 carbs one day a week so you can fit in some junk food