glitterina
The first step is to weight yourself and properly measure your height. Put the figures in here:
www.nhs.uk/Tools/Pages/Healthyweightcalculator.aspx
Then change the weight until you find the weight you need to be to have a healthy BMI (under 25). That gives you a target and it means you know where you stand.
My BMI on 1st January 2018 was 43.8. I was 17st 8.5lb, 160cm tall (5 foot 3).
To have a healthy BMI I need to get to 10st 1 - so 7 1/2 stone to lose. My actual goal is 8st 11 though, this will be half my body weight.
It's now 30 weeks since 1st January 2018. I weigh 11st 4.
I haven't done anything fancy. Not following any commercial diets. I just eat only healthy, whole foods and nothing processed. I have 4 young children (aged 3-13) and we all eat the same meals and food as a family. Everyone is enjoying it. Our meals are delicious and always healthy.
I started daily long walks in February and then Couch to 5K in April. I now run at least 5k every day. I can run 10K easily, and do so a few times a week.
I don't routinely calorie count, but do have a few weeks here and there when I track and weigh what I eat so that I have an understanding of my calorie usage. I eat 800-1000 calories on low exercise days (12000 steps or under) and around 1200 on higher exercise days, except Sundays*.
My calorie burn is usually around 2500-2800 according to my fitbit. I don't know how accurate this is but I usually have a 1000-1500 daily calorie deficit and lose around 3lb a week.
I am never hungry. I eat as much as I need/want to not be hungry, but no more than this and what I do eat is filling, healthy and wholesome.
*Sunday Dinner is my treat meal - includes all the trimmings and a pudding. We relish this because it is a big treat for us all.
There's no end-date to this for me. We will always eat in this way now. I may ease up on my running when I am slim. But actually I'm really enjoying the running so I may not.
I honestly don't know how I will manage to eat enough to only maintain my weight, rather than lose. I would need to almost double my calorie intake and I can't imagine consuming that much given I am never hungry or wanting got more. So I think long term, I won't stop at BMI 25. I'll keep going until my weight reaches such a level where what I currently eat at my level of activity is right to maintain. I can see that being properly slim. That's an odd concept for me, since I've been obese/morbidly obese for such a long time.
You can do this OP. With some significant life style changes it shouldn't take too long either. You could be slim by next summer.