Accounting for calories needed/burned while nursing

Hi- I am new here! I had my baby 8 weeks ago and need to lose some baby weight (and then some leftover from my other "baby" 6 years ago). I am also nursing my new infant, and supposedly burning all kinds of calories by breastfeeding. Is there a way to account for the calories burned from nursing? Is there a minimum caloric intake that I should adhere to while breastfeeding?

While I would love to have a nice pretty number as my weight on the scale, I am definitely more concerned about getting back into shape and maintaining a good level of fitness, and size- mainly, fitting into all of my old clothes that I still very much love!

Any help/thoughts/advice for getting in shape and losing some weight while nursing, and how to keep track of those calories would be appreciated! Thanks!