Try finding your caloric balance first off.   In other words, stick to a
basic diet for a week or so, and see how much you have to eat to maintain
your weight--not adding, not losing, just staying the same.  Then you
can work from that, reducing the intake or increasing the output
(physical activity) appropriately.
Be well.

  Jeffrey Smith       [log in to unmask]
O voi ch'avete li 'ntelletti sani/mirate la dottrina che s'asconde/sotto
'l velame de li versi strani [O you of sound thought, see the doctrine
which hides under the veil of strange verses]--Dante, Inferno, Canto IX