Sorry you’re feeling so low. I do understand something of what you feel, and how hopeless it can all seem.
Firstly, it sounds like you would benefit from counselling to help deal with the depression and why you are using food and drink as an emotional crutch. Can you ask your gp?
It took 10 years to put on the weight, so don’t expect to lose it really quickly - remember that slow and steady wins the race. You have to break habits one by one.
My advice would be not to go on a strict diet as you will set yourself up to fail. Instead, what small changes can you start making tomorrow that are healthier? Eg can you go out for a walk every day? Switch to whole grains. Make yourself a fruit plate every day to snack on instead of sugary treats. Just choose one night a week that you can eat junk/takeout and cook the rest of the time. Obviously you know the areas you can change - you know what you need to do.
But my rule would be this: Each thing has to be a sustainable change that you feel you can stick to for the rest of your life.
Once you have gotten used to those changes, make some more. And so on.
If you mess up and have a gorge session, forgive yourself and move on. Having the odd blow out can be part of a healthy normal lifestyle - and you need to be aiming to get into a long term healthier way of living.
Yes it will probably take a couple of years, but you’ll have made changes for life, and won’t just put it all back on again. Time goes by so fast, so you’ll soon feel slimmer and healthier.
Wishing you all the best.