Depends on start point. If the healthy weight loss is 1-2 pounds a week, there might not be enough time for up to 20, but can’t hurt to try. Also, I don’t like the word cheating, as it can make people feel guilty. Well done for starting exercise tomorrow.
lbs a week at most. Make sure you keep things realistic, because even when you are incredibly dedicated, life will still be going on around you. Increase your water, eat more protein, cut back on processed foods, and count your calories. You can do this!!