Yeah I would say in general habits are the most powerful force in health. Finding an activity you enjoy is 1000x easier to stick with than anything that feels like a grind.

Same thing for food. Trying to switch to a healthier but difficult diet wholesale fails essentially always. But what's relatively easy is finding a healthier alternative to one single thing you eat regularly, that you like just as well. This takes some experimenting, but is usually doable. Then once you've gotten used to the healthier option it becomes automatic.

Then you can replace a single other food, and so on. I think that gradual and sustainable are the most important things to focus on for most people looking for general health improvement.