You want the Low Carb Bootcamp right here on Mumsnet. It's a fantastic way to lose weight, you get loads of support and advice from other Bootcampers, ideas and recipes for meal planning, you don't go hungry or deprive yourself, you still eat delicious food, and you lose weight.
I did my first one in May 2019, I had a stone to lose, and that came off in almost the first fortnight (though that is unusual!). By the time we finished I was well within the healthy BMI range. After my second one I finished three stone than my original starting weight, and was a size 8.
I've remained low-carb (mostly, now I'm maintaining I do occasionally eat carbs, but they no longer form a major part of my diet) and kept the weight off since. I have more energy, so I work out more and have good muscle tone. As part of the WOE you eat loads of green leafy veg and drink loads (and loads!) of water so my skin is better than it's ever been and my immune system is fantastic - over than Covid I haven't been ill since, and I only got Covid very mildly (one day in bed, a few of feeling a bit rough, and a lingering cough and loss of smell/taste for a few weeks).
And it's free! Well, the WOE can be expensive, but there are no charges for the help, guidance, support or recipes, and it's such a lovely community, I love the Bootcampers. 
If I sound evangelical, it's because I am! Bootcamp is in my top 5 of Best Things I've Ever Done.