An easy fix would be to cut the amount of whatever you are feeding her in half. Two meals per day, measured amounts. NO SNACKS. No free feeding (leaving food down) Always have fresh water available.
Add a splash of water to the food, offer frequent bathroom breaks, opportunities to urinate.
Weigh in one week, step on the scale first and note your weight, then lift the dog up and step on the scale, note the weight and deduct your weight.
Increase daily walks, even if slow, leisurely, 10 minute walks. The more movement the better.
I can almost guarantee you will see a loss. She is cute, but she does not need the extra weight, obesity is not cute.
