A couple of walks twice a day, say 20 mins would be better as this keeps your metabolism ticking over. Jig about when your waiting for the kettle to boil anything to keep moving. Best of luck with it.
Easily.. combined with sensible eating.I have no choice but to walk .We don't have a car and public transport where I live is abysmal.I walk a great dog three times everyday for about half an hour each time.I walk back and forth for shopping etc. and everywhere else I want to get to within reason. Get into the habit and you will soon see the benefit .A brisk walk in the fresh air is a real tonic.
If you are in a reasonable state of health steady walking will probably only exercise the leg muscles. To get more aerobic exercise for heart and lungs you need to walk briskly so that you perspire and breathe more deeply.