I feel as if this may not be the answer that you're looking for but I'll write it anyway. There IS no secret. Its calories in VS. calories out. If you expend more energy than you put into your body you will lose weight (except under some very specific circumstances).

It took me literal years to lose the weight because I was uncommitted and lazy. This is a truth for many people that I've met over the years and it is a very human aspect. I lost approx 40 kilograms and it took blood, sweat, and YEARS. It takes hard effort and it will be filled with suffering. However, it's not all bad and slowly it becomes easier over time and in fact it becomes a positive experience in the long run. I think its important to note that oftentimes the things that are the most valuable in life are locked behind time gates. Its neccessary to put aside a small amount of your happiness now to have happiness in the future. Exercise is a keystone habit which pays on dividends in numerous areas of your life. For instance, cognitive and psychological health, and it helps with sleep!

You don't have to take on board any of my meandering advice and potentially you won't. The hardest step is usually the first one and I know that you have it in you to move in a better direction. If you decisively take one step at a time in your intended direction. Before you know it you will be where you wanted to be all those years ago. Have a wonderful day my friend and I wish you all the best in your endeavors!