Learn to do 16-8 intermittent fasting. Easiest way is to skip breakfast and to eat lunch/tea/dinner within an 8 hour window. This is assuming you don't have gastric.

Then target minimum 6k steps a day as a baseline. Then start working your way up higher and include jogging and hiking in your routine.

Food continue as per normal, just don't take added sugar for a start (i.e. zero beverages except black tea or coffee). And perhaps reduce rice/carbs protion while increasing veggies/protein on plate, by small amounts (10% to 25%)

Practice this for a couple of months. Then take more drastic measures if needed.