Hi, You can start doing light walk n also few stretching exercises concentrating on your pelvic floor, abdomen, thighs n backs after 45 days of c section delivery. Rest of the message you can do till you feel comfortable. Have good sleep n rest , try to breastfeed more to reduce weight fast. Have right foods,stress less. You can consult personally for a customized plan after a month or so, with me, as I am from Delhi too.

Yess you can lie down on your tummy and it will help you and give you results as you want,beside this eat healthy balance diet devided into 3 main and 3 small meals with some regular intake of nuts and milk. Do light walk as well hands and legs light stretches and relaxing exercises to keep yourself fit.