I guess start by making plan of what you want to achieve?
ie. lose x% of fat in 3 months' time or reduce cholesterol/ blood pressure to x number by y timeframe (if yours is high).

What you can do is start by making small adjustments. Because when you drastically change your diet/ habit, it's harder to adjust you might find it 'too tough' and end up giving up halfway. By having a goal you have something to work towards.

Personally i can emphatize and relate on meal prep. Its not easy if you need to get up early and have a busy schedule at work.

That's a quick way to unhealthy you. Too much under-eating.

The first 10kg you lost is mostly water weight cause you cut off too much food especially carbs..

Quick way is surgery to remove fat cells. Otherwise just cardio & calorie deficit.

There's no shortcut. Under-eating only leads to moody you and at the end unable to keep going then back to binge eating. It also can cause serious issue to your health as you're not getting sufficient micronutrients to your body. Each micronutrients are beneficial to certain function of your body. Say if you keep this going on for years then you'll experience gradual decline such as vision, digestion, metabolism, skin, hair, etc., you name it.

What you need to do is eat as usual and start cutting off fast food, sugary drinks and any high calorie dense food. Not because carb/sugar will make u fat. Its because you can easily eat over the calories that u can burn.

P/s : people made too convenient these days. Everything use internet eg Grabfood, Shopee, etc. less NEAT = less calorie burn. If you can't even spend 1hr daily to exercise to make up of those conveniences then don't expect something unrealistic.

If you're seriously obese like super fatty then losing weight fast by under-eating is okay for a short period of time.

From the picture u share ur just skinny fat. Don't go under-eating too much and losing so much muscle.. It will gets harder to burn calories/fat when you don't have muscle/metabolism.

THose are stubborn fat. Usually your arm/calves/face/chest will lose fat first. Most men store stubborn fat at lower abs / lower back / side abs / thigh. You need to cut longer in order for your body to tap the fat cells there.