slim down. join dragonboat or muay thai @ fightg
self esteem is something that build up with success in life.
just believe in yourself. set yourself some realistic goal to
achieve like sliming 5 kg in 3 months time or getting A for maths.
On the opposite, people who has low self esteem comes by failures
in life. I sense that for your case must be your overweight body. I
believe that once you "START" slim down you would become more
confidence.
To slim, the cirtical point is to control your diet. Eat less
fat and carbo, more protein. eat half the rice you normally eat,
eat less noodles.