In terms of weigh loss, moving/exercise plays a very minor role. Even if you believe the myth of calories in, calories out, the calories burnt by exercise are minuscule compared to energy needs just for staying alive.

What really, really matters first is what you eat and not how much you eat. Because if you eat right and get your hormones (mostly but not only insulin) in control, your hunger and cravings will go down, a lot. You will automatically eat less. Eg. you then don't even need the will power as you will stop being hungry all the time.

Exercise helps somewhat mostly because it helps to deal a little bit with the poor western diet but not by burning calories but by affecting your metabolism.