You could try, also, adding in 30 minutes of
yoga 3 day/week. You also need some strength training, which can be done with light hand weights and moves, such as squats and lunges. You could alternate yoga and the strength training and take a walk daily.
There are many other forms of exercise that are also very good, such as swimming, biking, dancing, etc. You have to do what you enjoy and will be able to stick with and can include in your schedule.