Remember that it is harder to lose weight when you are older (over 40 years). The only advice I can give is: try not to gain the weight in the first place.
That can be difficult, because you have to juggle so many things.
Yes, if you take in fewer calories, and burn off more calories, the math should result in decreased weight. However, there are two other important factors that make the math more complicated.
1) Stress. If you can reduce stress in your life, do it. Unfortunately, stress is just a part of life these days, so you have to do all kinds of things to counter stress - like breate, laugh, sing, exercise, play, hug or be hugged. Now, those things that people usually do to cope with stress, like alcohol, drugs, smoking, or physical violence, will make things worse in the long run.
2) Sleep. Sleep is important for your body to get itself back in balance. Get your 7-8 hours per night. (More sleep than that can be unhealthy!).
As you get older, you should be eating less because your metabolism is slowing down. I know how difficult that is to do, because I love to eat, and to try new foods, and...
So you think you will just exercise more, but then your body won't let you exercise at the same pace, because of arthritic knees and sore backs, getting dizzy or losing your vision. That makes it more stressful... You can see the vicious circle going on here.
Develop a life routine of eating moderately at regular intervals, exercising or playing regularly, and sleeping at consistent time. The same routine or schedule very day.
Yeah, right!