one Thing IKnow About Cardio Is That You Don't Start Burning Fat Until After 30 Minutes. So Maybe Focus On The Amount Of Time You're Walking At A Safe/ Fast Pace . I Would Suggest An Hour. I Used To Do This In ThE AM And At Night. Cut Out Sugars & Eating Late. Increase Water AndAdd Lemon To It. :)
You can't lose 20 lbs in a month, safely. You'd have to cut your calories too drastically, which will actually prevent you from losing weight.
Women should never go below 1200 calories/day.
Exercise contributes only 30% to weight loss. You need to cut down on your calorie intake dtasticlly. Your app will tell you exactly how much... Id guess eating no more thann 1000 calories per day.
Ur two mile is a good start as long as ur trying