Hey again! Glad to see you're still fighting, weightloss is a pain in the butt especially when you have other extenuating circumstances.
I thought I would go into a little more detail as to how going back in time I would've started and how I'm currently doing it as someone in (mostly, I'm a 5'11 dude with a broad build who started weight loss morbidly obese at 158 kg so there are differences) the same position in regards to weightloss while diabetic and on Metformin. Firstly what
Imran said was correct, when I first went on Metformin my weight fluctuated quite a lot and whilst I didn't track how long it took to settle it was at least close to a year so take that into account. Also, no diet advice apart from "less calories in, more calories out" is going to be one size fits all not to mention I'm neither a GP or RD so take everything with a Dead Sea worth of salt.
I'll restate what I've said before, the key to losing weight while diabetic in my experience is a sensible amount of calories in (1200 is the lowest sweet spot for being able to function like a normal human being in my experience, take it from someone who has done VLCD diets before they're no fun even if they can be effective) and continuously more calories out. Cardio specifically which it seems like you're doing pretty well with! I'll pass on what my physio guy said about what kind of cardio I should be doing daily as it's short and sweet, "It doesn't matter what you're doing as long as it's at least 15 minutes and by the end of it you're sweating like a stuck pig". For me I saved up and bought an exercise bike for my home gym as it's what I found to be the best trade off for ease of use, comfort and fat burning effectiveness. Since Fitness Boxing came out I've also alternated with that as it's a pretty good workout as well, Ring Fit is a lot of fun but the time spent to calories burnt ratio isn't as high as something like Fitness Boxing which itself isn't as high as something like an exercise bike. Ring Fit Adventure in my opinion is a much better tool for keeping weight off and focused toning on specific areas of the body, which it is very good at. But if someone was to ask me what one daily workout they should be doing to burn fat it would be interval training on a stationary bike, it's really effective and you can park it in front of the TV (I use my daily ride to catch up on anime) or just chuck on some music.
As for diet specifically this has what has worked and is currently working for me;
Breakfast -
Meal Replacement Shake /w 250ml of Skim Milk (or water depending on what kind of shake) & a cup of black coffee (sometimes I might have a small bit of skim) or unsweetened green tea.
Morning Tea -
Piece of fruit (Usually either a banana, orange, 2 mandarins or an apple depending on my mood) & a cup of coffee (black or with a small bit of skim) or unsweetened green tea.
Lunch - Meal Replacement Shake /w 250ml of Skim Milk (or water depending on what kind of shake) & a cup of black coffee (sometimes I might have a small bit of skim) or unsweetened green tea.
Afternoon Tea - Piece of fruit (Usually either a banana, orange, 2 mandarins or an apple depending on my mood) & a cup of coffee (black or with a small bit of skim) or unsweetened green tea.
There are of course many schools of thought when it comes to the benefits and negatives of meal replacement shakes but again this is just from my personal experience, but I found replacement shakes to be a net positive for weight loss and along with the exercise are what I would credit as the key reason for my own weight loss. This of course can lead to weight gain after you stop because you have to start figuring it out yourself but as long as you realise it's a possibility it's not hard to avoid by planning for it before you stop with the shakes. I also have to point out because of the diabetes we have to be more selective on what ones are right for us and you will want to run it by your GP first as some shakes absolutely pack the things full of sugar.
Going by the Vegemite I'm guessing you're a fellow smoke inhalation sufferer from Down Under so here are my specific picks. For me Optifast worked very well, I lost 40kg in about 4-5 months following their full VLCD/Keto plan before stopping it and moving onto a more normal, less soul-destroying diet with more cardio than previous (though you don't need to follow the full plan to just use the shakes), but it's pricey. These days I use NaturesWay Slimright stuff which can get from Woolies, Coles, Chemistwarehouse and Amazon. Optislim is an Australian clone of Optifast and it's also pretty decent. If you're not from Australia you will have to do the research yourself (along with a GP or RD, but that should go no matter what, if you make drastic diet changes you should run it past one or both) on what is suitable.
Dinner -
I have a great big folder of recipes I've either found or made myself over the years that all have between 250 and 450 calories as well as being diabetic suitable and I pick meals out of that every Friday to make a weekly meal plan. I can pass some along but there are also plenty of resources online you can take a look at.
All Day - Drink at least 2L of plain water and if I want to drink something sweet I stick to either a glass of Nexba or Pepsi Max, I also take supplements and multi-vitamins to make sure I'm still getting everything I need.
Fast Food/Takeaway - Lets face it, sometimes you need a treat for your own sanity or you have no other options than to buy something. Your options are pretty simple - Subway, Grill'd, a salad place, sandwich place or anything else along those lines. You can find at least one of them anywhere you go and it's what you will want to stick to. At worst sticking to something like a caesar salad or a salad wrap or something is pretty easy to do.
Anywho, that's what personally helped me but the real struggle with weight loss is finding what works for you individually as it changes for each person. It took me years and years of trying before I finally found what worked for me and when I did the weight (almost literally) fell off of me. Do note that your body also takes time to adjust to diet and exercise changes - weigh yourself before you start and then give it a few weeks of sticking to whatever plan you decide on before you weight yourself again, there is nothing more confidence and willpower destroying than starting a diet for a week, jumping on the scales and seeing nothing change or god forbid, your weight has gone up - don't do it to yourself and give it time.
Feel free to chuck me any questions or thoughts you have about anything weight loss, diet or exercise related, either here or in a PM - it helps to have people to talk to/bounce questions off/vent to.