Be a Missionary Now
You expressed a desire to become involved in missions
now where you are. This is very important in preparation
for missions because the best missionary here will be the
best missionary overseas. What kind of activities do you
see yourself doing as a missionary? Find ways to develop
those skills in ministry here. Talk to your pastor or other
spiritual mentor about ways you can serve as a missionary.
If your desire is to work with kids, for example, you might
want to help out with Sunday School or kids clubs. You might
find that your best first move is taking more of a leadership
role in youth group, Campus Life, Young Life, or other
activities your involved in now. Do research. Find out what
opportunities are out there to help you be a good missionary
here.
Be a personal evangelist--don't hide your faith altogether,
but it does not have to be the basis for every friendship.
Make sure you have some non-Christian friends and that
you're a real human Christian example to them. Love them
and share your faith with them through your actions...and
then through your words when they start asking why you do
certain things.