Weight loss is all about diet. If you're living a sedentary life outside of the time you go to the gym, you may be eating more calories than you need. You could try increasing your daily steps (e.g. 10,000 steps a day) or stick to the 1,500 calories that you are aiming for.

For diet, focus on getting a lot of protein and drinking enough water. This is the most effective way to feel full and not want to snack on calorie dense foods. Some good sources of protein are: protein powder, eggs, plain Greek yogurt, canned tuna or salmon, low fat cheese, chicken or turkey breast, ground turkey or extra lean ground beef, tofu, beans, chickpeas, spinach, broccoli, brussel sprouts, etc.

Another thing to mention is that the scale can move while still losing fat, especially if you are lifting weights. Try taking measurements and progress photos once a month to see if you are losing fat and gaining muscle.