It's not always easy, when you're "sedentary", a little overweight and not very used to moving, to take up sport overnight!
How to find the will?
First of all, do not be discouraged by recommendations and remarks. Keep in mind that even a small increase in activity will be beneficial!
You also have to listen to yourself, try several activities and choose one that makes you happy. If ornithology allows you to go out on foot, or if water aerobics is good for your morale, that's already a great victory!
Several initiatives exist, in the regions and municipalities, to encourage sedentary people to move more.
The important thing is also to have fun. To feel good about your activity. Don't be afraid to try. It takes time to find. But the benefits will be even better.