I've always battled with my weight and mobility problems and at this time last year was facing the prospect of being confined to a wheelchair. No one can help, it's really down to you. Last June I just decided enough was enough and I was going to loose weight. I weighted 20st 12 lb, BMI was 49 and I could hardly manage to walk from the house to the car.
It's not for everyone, but I joined Weight Watchers online and found setting small goals was the key. I set a target of loosing an average of 2lb a week for a year and exercise gradually increasing exercise every day. The plan awards stars when you reach milestones - 7 lbs, 5% or 10% of start weight, 25 lbs, 50 lbs etc. There are also graphs so you can see your weight drop. I've lost 102 lbs (7st 4lbs) so just 2 lb to go before I reach my goal for the year and still a few weeks to go. Although I'm still overweight that brings me out of the "clinically obese" and "obese" range.
I found planning, eating lots of veg and filling foods such as eggs helped as did substituting foods high in points/calories/saturated fats with something else. Generally I avoid cakes, biscuits, crisps and alcohol although I don't deprive myself entirely. After almost a year healthy eating has just become a way of life and I fully intend to keep going until I've lost another 50 lbs and my BMI is lower than 25.
Instead of biscuits I eat a Scotch pancake with a teaspoon of maple syrup or a banana which are more filling. Also you can keep a M&S Count On Us Chinese meal in the freezer to eat when the rest of the family have a carry out. Not only is it healthier, it's cheaper and if your children are anything like mine you may find that you end up having to buy COU meals for them too. Rather than deprive or binging can you cut your consumption of wine to one glass?
As others have said 10 min swim is a good starting point for exercise. I used to have great difficulty even getting from the car to the changing rooms and getting changed but by persisting and going most days I've gradually increased to 45 min swim, 25 min gym and 30-45 min cycling. Often I exercise late in the evenings so I don't sit watching TV and munch. Although walking isn't that great and never will be, it is 100% better than this time last year.
Personally I find going to meetings, reading and talking about slimming doesn't help because the focus is constantly on food. Apart from the first two or three weeks when I was learning to plan I concentrate on controlling and recording the points I use and I try not to think about food. Instead I keep motivated by looking at clothes I can wear when I'm a size or two smaller.
Although only you can decide that you really want to loose weight and the best way to do it which fits into your lifestyle there are lots of people you can draw on for support - your GP, practice nurse, gym staff and other slimmers.