If you're working out regularly and eating a healthy diet, you should start seeing results within a few weeks. However, there are many factors that can affect how quickly you see results, such as your age, genetics, starting weight, and fitness level. Generally speaking, the more overweight you are, the faster you'll lose weight; if you're already at a healthy weight, it may take longer to see results.
Of course, seeing results isn't just about losing weight; it's also about improving your strength, endurance, and overall fitness. Even if you don't lose any weight, you should still see improvements in your physical performance after a few weeks of regular exercise. So don't get discouraged if the scale doesn't budge right away; as long as you're sticking to your workout routine and making healthy choices, eventually you will start to see results.