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To loose weight determination and cooperation of individual and to some extend family is required,
See if you do vigorous exercise and increase calorie expenditure and consume less calories weight loss
is possible certainly,a deficit of 7000 cal will cause loss of 1 kg.
Eat protein in breakfast avoid high carbohydrate
Remember get a medical check up you do not have any medical ailment like hypothyroid etc. also look up at genetics that is family history.
by adding yoga
and having sleep for at least 7 hours a day.
Once you are examined and if required some medicines may also possibly help.
Instead of walking add aerobic activity like swimming, cycling, dancing .
You can do it do not give up.
Good Luck to you