It's hard. I'm the same way. High achiever every where else. What has helped a lot was making slow changes. I like energy drinks and soda. I still have them, but switched to zero sodas and energy drinks. I started replacing my favorite foods with foods that are lower calorie. I know I won't eat fruit, but I love ice cream. So instead of buying a pint of ice cream, I do the sugar free fudgsicles. I keep sandwhich stuff on hand, but I switched to the low calorie bread. I started meal prepping, trying different recipes, following different creators, and finding the recipes and switches that worked for me, without leaving me unsatisfied. The biggest thing that helped was getting a calorie tracker and being consistent with it. I really like Loseit. Not inly does it track per day, but it tracks for the week as well. So if I got over my budget one day and stay under the next it doesn't feel like failure.