Drink 2 glasses of water during a meal"? Don't even know whether those work in real life,
That one at least is useful advice: water helps fill your stomach without adding calories, and it also helps you to digest your food more efficiently. So if you don't add extra, it has to come from the foodstuffs themselves (which makes the food bolus more stodgy/ less digestible) and/or your own digestive juices (which dehydrates you).
Right now I'm going to try and gun for a strict feeding schedule three times a day in a 8-hour window.
Reducing the amount of calories eaten is a good start, but (like
@Ryika hinted) losing weight happens most effectively if the amount of calories
burnt can be increased as well.
I know you're not in great shape medically, but how mobile are you? Because if you could manage it, setting aside 5-10 minutes (ideally 2-3 times a day) for some gentle physical activity, would also likely be useful. Doesn't really matter what kind of exercise you do, although it would be best to choose something that you think you'd be able to stick at.
I mean, I'm not suggesting you take up jogging or high-intensity aerobics or anything similarly sweaty

— but even something as simple as going for a short walk, maybe just around your building, or around your block, would provide some benefit. Or if joint-pains/impacts are an issue (or it's raining again!), maybe something even lower-impact than that (and indoors), like yoga/ Pilates/ t'ai chi (there's plenty of workout videos available on YouTube), or some time on the lowest resistance setting of an exercise-bike or rowing-machine (if you already have one).
(Swimming is also great exercise for people with limited mobility — and being immersed in cool water stimulates the body to mobilise/burn additional calories for warmth — but obviously requires someone to have the ability/ time/ funds/ inclination to get to a pool in the first place.)
And drop the sugar. Drink tap water as often as possible, tea or coffee only in moderation and never with sugar,
Yes, this, a thousand times this. There's plenty of evidence linking obesity to diets high in (refined) sugar, never mind what it does to your teeth.
(I know you'll disagree, but soda
is even worse than Oreos in this respect

).