Having been in a similar situation a few years ago mate (60lb overweight and so much stress I ended up in hospital) I have a couple of suggestions.
1. I can't sleep at night. I stay awake till 9 am in the morning, exhausted, then I sleep. I wake up at 3 pm, and I would still feel tired.
Exercise. As much as you don't feel like it, it is the best cure I've found for this. The problem many people have nowadays is being mentally but not physically tired. I notice that my sleep goes to hell when I take a break from the gym.
2. I can't lose weight. I eat eat, I would eat 10 times a day, as long as there is food infront of me, I just keep eating.
Losing weight is really quite simple, its calories in vs calories out. There have been some suggestions of low carb/keto diets, these are good as they essentially force you into a calorie deficit. The option that works for me though is quite basic, get MyFitnessPal, figure out how many calories you need per day then plan a few meals around it. I order anything I need for these meals and cook them up in bulk, portion them out and freeze them. No reason to have takeaways or eat out unless it a treat.
This sounds arduous but actually it saves me loads of time, I cook for 2-3hours on a Sunday, once a month MAX, after that it's just reheating stuff in the microwave for a couple of minutes a day. It's also a lot cheaper, Chicken breast in the supermarket here is ~£10 a Kg, I pay £4.50 in bulk, the same for Mince.
As an example, order 10Kg of chicken breast and 4 Kg of lean mince. That's about 120 servings of 1 chicken breast and 80 x 50g servings of mince. Cook that over a weekend and in the end you have about 2 months worth of food made up in a few hours, you mainly spend your time waiting for the slow cooker to finish!
Cook 5Kg of the chicken, put one breast in each bag (more than 5 won't fit in my oven)
Use a slow cooker to make Chilli (2kg of beef), divide it into 50g portions
Use a slow cooker to make Bolognese (2kg of beef), divide it into 50g portions
Bulk cook 1Kg of Rice and divide it into portions in Tupperware,
Bake 10-20 potatoes
Cook 1Kg of Pasta, divide it into portions
Cook 2-3 trays of roasted veg (not starchy just peppers, courgette, brocolli etc) and divide that into portions.
Each meal you now grab, one portion of meat, one of carbs and one of veg, put them on a plate and warm it up. If you've calculated the portion size properly you're guaranteed to not overeat so you will lose weight. I tend to go a bit smaller on the portion sizes than i calculate so I ca fit in a treat every now n then.
As for exercise, don't worry about cardio too much. I surf or hike every weekend because I enjoy it but I don't use a treadmill or bike. Focus on strength training, use something like Stronglifts 5x5 which is easy to follow, quick intense sessions and gives you the reward of seeing your progress every week. Pretty soon you'll be addicted to adding weight to the bar.
3. Stress: I think about work too much. I already makes decent passive income. But I think I want more and I want it fast. I get stress when work don't move at good speed.
Best suggestion I have for this is take up a hobby that means you can't think about it, Surfing, Hiking or Climbing are good, all a bit of exercise for point 2 but you're busy thinking of what you're doing and nothing else. Also you're unlikely to get internet when you're doing these things.