Another one here who only eats once a day. I know it's not for everyone. I know all that stuff about you 'must' eat breakfast, but that's never worked for me (I just feel hungrier!).
I do myfitnesspal, and I 'save' nearly all my calories for my evening meal, and really (and I mean really!) enjoy it, and I never deny myself any food group! And I speak as someone who was a bit 'blobby' at 48 (4 stone overweight) in 2015, and resolved to be 'fit by fifty' (by July 2017) and by then I'd lost the 4 stone, taken up running, and here I am nearly 2 years later, still eating mostly once a day and still monitoring everything on myfitnesspal. I really do think monitoring everything (and not lying to yourself) is a key part of this. It has to be your 'new normal', your new way of living/lifestyle, or it's never going to stick. It also has to work around cooking for your family, otherwise it won't stick. That's why eating 'normal family food' is a must, just less of it and keeping tabs on it using an app matters so much.
I do run a bit now too - nothing spectacular as I have dodgy knees, but I can knock out the odd 5 or 10K these days from not running a step two years ago, and it's great when 3 or so maintenance 5Ks a week 'pay for' the odd eating treat.
Just start slowly. Don't think of it as 'losing 10 stone' otherwise it'll just feel like an insurmountable hill you'll never conquer. Do a stone. Celebrate. Then do another. And so on. Go for a walk a few days a week. Just 30 mins, as fast as you can. It all helps, and walking is gentle on the joints.
Good luck!