I work on goals basis. This is how i motivate myself. Try to set small goals in the beggining, like 5 min exercise and grow them on the way as you get used to them in your routine.
Find a way to make movement enjoyable. There’s a method called “temptation bundling” that involves combining an activity you enjoy with one you don’t like so much, so the less enjoyable one becomes more appealing. If you have access to a treadmill, try walking on that while watching a favorite show.