Start with doing this one thing: stop consuming ALL sugar, carbs and alcohol. Eat protein, fat and green veggies. Do this for one week and you'll notice a real change such that you'll continue do this. Your cravings will diminish and you'll begin losing weight.
You can do anything for one week.
I was where you are three years ago. I weight ~255 lbs and I was headed for life in a wheelchair.
Today I weigh 175 lbs, my blood pressure is normal, and I'm considered healthy.
I'm 66.
You can do it. You just need to take that first step, no more, no less, and the rest shall be revealed to you