What LaahDeeDah said about hunger.
Feeling hungry, or not getting to enjoy feeling satiated following a meal are just sensations in the body. No need to do anything about them, even if we're conditioned to try to 'fix' the initial discomfort thereof.
Having a 'long game' mindset is useful: think about where you want to be next Christmas, not in 8 weeks time. You've said you have 7 st to lose -don't focus on that. Instead think about what you can safely expect to lose and keep off making a reasonable amount of effort without expecting the circumstances that have made keeping a healthy weight difficult to change ‐you can only control certain things without too much stress. If that means that you find you can lose and keep off 2kg per month, that's enough.
Portion sizes are an easy win. Get some smaller bowls and plates.
If you've never done it before, spend a week calorie counting. Download MyFitnessPal and accurately weigh and measure everything you eat. Totally enlightening, and likely to change how you look at food forever.
Try intermittent fasting. 5:2, 16:8, 18:6, they're all useful. I like how IF changes one's expectations about how eating happens in a day and so helps forge new habits.
Reduce carbs. Don't bother trying to swap them out ‐just don't have them. Just have the bolognese, ditch the pasta. And so on. It's stops being weird after a while. Reducing carbs is the most freeing thing ‐once the body deals with not having them, the physical sensation is gorgeous and the mind experiences this tremendou
s let-go.
Get a bit transactional about eating. It's just energy ‐you need it, but only a limited amount. Anything more is superfluous, why would one take more than one needs, in any area of life (cue glaring parallels with the whole of western civilisation ‐I find this awareness helps a lot). It doesn't really matter what your calories consist of: you can let go of meal composition or what you're expected to eat at specific times of day. Stew for breakfast? Sure. Sardines and yoghurt for dinner -why not? This too is freeing. As long as you know you've had the amount of energy your body will need for what you expect it to be doing for the day, you don't need to give food a second thought.
Set realistic goals and assess dynamically on a day to day basis. Perhaps you decide that you're going to aim for 1500 calories / day to maintain steady loss. Keep asking what's necessary. If you've spent a day WFH and not left the house, that'll probably be way in excess of what you need for the day. So you won't need to put in 1500. And the other way around.
Good luck, OP!