Basic jist is that you only eat for an 8 hour period per day. Say from 12 noon til 8pm. Just means skipping breakfast for most people. You can shift the eating period to suit. For instance you could eat from 10am to 6pm if you prefer. Not for the entire 8 hours though...
ummmm, I don't think it's always easy to change your attitude to food. Especially if you have deep rooted "issues". I think you need to deal with the excess weight asap, and by any (safe) means, then you can try to tackle your relationship with food.
You need to try to develop the habit of rewarding yourself with something other than consumables when you have a breathing space and want a lift. Make a list of alternative things you could do that you like. Then put that into practice substituting for the biscuit / crisp sneak. Know what you mean though, if I'm frustrated I tend to stand up and suddenly realise I want something tasty and was about to go get it, but I don't really, not deep down.
I need to shift a few pounds for myself though. My hormones have been all over the place since my youngest was born which hasn't help me lose weight. I really don't want to be the "fat mum" waiting at the school gates!
Here's a guide to various types of intermittent fasting...in the comments someone asks about coffee,and the answer is that a drink that is no more than 50 calories should be fine. Interesting stuff...we may often fast without realising or intending to.