If you aren't willing or able to calculate daily calories, a discipline on meals (two meals+breakfast, as few snacks as possible) and food (cooking yourself, some veggies, the least possible amount of hyperprocessed food aka Fast Food, soda and premade meals) plus some physical activity (2 hours twice a week, or one hour every other day, no matter the sport, but you need to sweat) will already do you a lot of good.
Also note that not all countries are equal in terms of food. America is really fucked up from what I'm told, there's sugar everywhere, including in bread, and the portions are humongous. So you may still need that calorie app if you live there.
I was 96kg in August 2022, I've lost 11 kg in a year and a half so far (9 in 6 months, I'm just cruising down slowly at my weight now) by not buying soda anymore, changing fast-food for the good kind of packaged meals (frozen ones, of a brand that uses normal stuff to make the meals, ie no additives to what you'd use to cook it yourself) and exercising regularly (2-3 times a week when I was really loosing weight, now once a week, but a good 2h one, to stay in shape).
Hope this helps!
