Of course exercise us important for a variety of reasons besides weight loss. But soneone once told me you can’t out exercise a bad diet. The game changer for me was tracking what I ate and when. I use the My Fitness Pal app which can be synched to exercise apps like Garmin. That gives you of a running total of what you can eat and you can set a weight goal and it will calculate caloric intake to meet that goal. Tracking what you eat makes you think about what you are picking up to eat and how many calories you are taking in. It also can help you make healthier choices about what you eat. When I started I was surprised which foods were calorie dense and which weren’t.
Also, healthy weight loss is usually considered to be 1 to 1 1/5 pounds a week so your goal of 20 lbs by the end of April is probably in line with that.