I would like to share an anecdote. In March 2016, I was weighing 96 kilograms (211.64 pounds). I made just one change during that time which is to stop having anything with sugar. I continued to take other natural sweeteners like jaggery and honey. The rest of my diet remained the same and my activity level remained the same ( I work in IT as a network engineer in a desk job) In October 2016, I was weighing 72 kilos…
Examples:
Started walking.
Started cycling.
Cut out processed foods.
Switched to a specific lifestyle diet.
Took up some kind of sport.
Cut out sugar/went Atkins/Keto/Paleo.
I don't think there's a wrong way to break a series of bad habits and build new ones, and I think the hardest part is deciding to do it, and sticking with it.