What you're probably seeing

• Belly: soft, general fat. Abs can't show until it comes down.
• Chest fullness around the nipples: most likely fat, sometimes called pseudogynecomastia. A mild glandular component (true gynecomastia) is also possible. Higher body weight raises the risk because fat tissue converts androgens to estrogen. Glandular tissue is firmer, often tender, and has fibrous cords. Fat is soft and uniform. - Harrison's Principles of Internal Medicine 22E, p. 3158
• Quick self-check: pinch behind the nipple. A firm, rubbery disc under the nipple suggests glandular tissue. Soft, squishy tissue suggests fat.
• See a doctor if:
  • there is a hard or one-sided lump
  • the area is tender or there is nipple discharge
  • the enlargement started quickly
  • you are taking any medication or supplement (some cause it)

The plan: lose fat first, then build

• Eat about 300-500 kcal below maintenance. That is roughly 0.5 kg of loss per week.
• Eat protein at about 1.6-2.2 g per kg of body weight daily. Good sources are eggs, dal, paneer, curd, chicken, fish and soy.
• Cut liquid calories (sugary drinks, juices, chai with lots of sugar), fried snacks and late-night eating.
• Keep carbs, but make them rice or roti in measured portions with plenty of vegetables.
• Sleep 7-8 hours and drink enough water.

• Push: incline dumbbell or barbell press, flat press, overhead press, lateral raises, triceps.
• Pull: pull-ups or lat pulldown, rows, face pulls, biceps.
• Legs: squats, Romanian deadlifts, lunges. Big muscles burn the most energy.
• Add weight or reps every week. Chest muscle built under the fat gives you a firmer shape once the fat drops.

• Walk 8-10k steps a day.
• Add 2-3 sessions of 20-30 minutes of brisk walking, cycling or incline treadmill.

• Train them with planks, hanging leg raises and cable crunches 2-3 times a week. These build the muscle but don't burn belly fat.
• Abs usually show at roughly 12-15% body fat. Expect many months, not weeks.

• A good-looking physique comes from broad shoulders, a developed chest and back, and a smaller waist. Prioritise shoulders, upper chest and lats, and lose waist fat. This look appears long before visible abs.

Timeline

• Months 0-4: deficit plus lifting. Expect to lose 5-8 kg and see the waist shrink.
• After that: if the chest is still puffy once you're lean, the cause is probably glandular. A doctor can check hormones, and surgery or liposuction is an option.
• Once lean: switch to a small surplus (about 200-300 kcal) to build muscle.

Avoid

• "Fat burner" pills, and any steroids or pro-hormones. These can cause or worsen gynecomastia.
• Crash diets. They cost you muscle.
• Endless crunches for belly fat. They don't work.

• What it does: It hydrates you. If it replaces a sugary drink or chai with sugar, it saves a few calories, and that is its main benefit.
• What it doesn't do: It doesn't "melt" or burn fat, and it doesn't target belly fat. My PubMed search found no human trials showing that lemon water causes fat loss. The only relevant result was a mouse and cell study of lemon extract, which can't be applied to people.
• Teeth: Acidic drinks can wear enamel over time. Sip it through a straw or rinse your mouth with plain water afterwards, and wait about 30 minutes before brushing.
• Stomach: If you get acidity or heartburn, drink it after food rather than on an empty stomach.
• Honey: Skip the honey or sugar. A spoonful adds calories and defeats the purpose.