Twin I'm not a fan of those diets but I know sometimes you reach the point where you'll try anything. I've been there 
I think there is some benefit to the vlcd method but if you can do it yourself ie buy/ prepare / cook the food you get a much better understanding of long term healthy eating. Obviously it all takes a lot of time and will power but in my experience any quick fix won't last long.
I'd really recommend The Blood Sugar Diet book by Michael Mosley. There is a tv show which may be on YouTube too. I'm not normally one to recommend a specific book or fad diet but that book really kick started my weight loss last year after years of stop-start attempts.
Also I really recommend MyFitnessPal. It's a really simple to use app that tracks calories, nutrients etc.
Good luck with it. I'll be joining you (but not until next Wednesday 