jia you!
or maybe u should change to a lady like girl now instead being a tomboy?
just my opinion.

if ur budget is not really low,
maybe u can try going to dorothy perkins?
they have slightly bigger sizes for bigger size ladies.

dont forget to put on a make up too!
dont over do of course.
a light make up will do.

and some acessories like necklace/bracelet is quite nice.

as for bag,
its nice for a lady to hold a clutch

good luck!