We strongly recommend our users consult their medical professionals before starting any new exercise/nutrition program. Please discuss your case with a doctor and let them know that workouts and meal plans can be modified to suit your current needs and preferences.
We can suggest checking our blog and some of the related articles, for instance:
BetterMe Blog is where you can find more information about breastfeeding, post-pregnancy nutrition and workouts, nutrients to consume, and foods to avoid, as well as useful tips for your healthy fitness journey. Simply click HERE to get redirected to the blog. When there, you can look for articles by using the keyword "breastfeeding" or "pregnancy" in the search bar at the top right-hand corner.
Besides, the BetterMe app includes Postpartum Workouts in the Workouts (iOS)/Training (Android) tab, which you may want to try.