sis,
its quite easy to find your calling, 2 main criteria for chosing a
ministry, you must have the desire, and you will already have the
ability to serve there.
reason is very simple, If its God's calling for you to serve in
that ministry, He will have given you the skills/talents to do it,
and also the desire to serve there as well.
(ps. never serve in a ministry just because of guilt or peer
pressure)
hope this answer your question.
God bless. 