I keep hearing this and the calories and such, and I find it unhelpful, even if technically true
The problem I find is that maybe you can lose weight eating nothing but mcdonalds/tendies so long as you only have 1,200 calories of those a day, but this fails because delicous, calorie dense food often leaves you feeling hungry and unfull, can leave you with a sugar high, and other things that make it hard to not snack between meals or eat more
even more, just suddenly trying to only cut calories and not change other things has never worked for me. I had to do one little thing at a time until I got used to it. The first thing was quit drinking alcohol or any other sugar drinks. Staying at this for a while (going on 4 months now) allowed me to focus on the next thing: eating "simpler", that is foods that are unprocessed, using that as an opportunity to teach me not just how to cook for myself, but also for others
here's another thing on that (cooking for self and others), counting calories takes a lot of attention an work. But my thought is that someone else has already done the work for more common, staple food items, in the form of portion sizes. You don't have to calculate calories all the damn time, just stick to single portions of food.
Finally, after the "not stocking up on diabetes foods", that allowed my blood sugar to stabilize a bit, so that foods that made me feel weird or unfull before now feel much better, more like how they're supposed to feel in your stomach. Exercise also has an influence on this (for me anyway). I can't eat a whole apple when I don't work out, but get me to seriously run or DDR for 20 minutes and I'll gladly wolf one down
so basically, do it for your health, do it to really teach yourself cooking (how many portions does this serve?), eat like people used to eat (low cost, simple, staples, unprocessed foods), do it to save money, do it to save time, don't complicate things.
focus on control, before you focus on weight loss