Might I suggest you consider going on a short-term international mission trip? If you are so inclined, I recommend that you explore going on a mission trip with one of these three groups. All are Lutheran organizations and very experienced in sending mission teams on international trips.
MOST Ministries — MOST Ministries is an experienced mission sending agency recognized by the Lutheran Church-Missouri Synod that provides short-term mission trips.
LCMS World Missions – The LCMS has many mission service opportunities. You might be interested to know that the LCMS provides online missionary training. Check it out at: http://www.lcms.org/page.aspx?pid=428.
Lutheran Hour Ministries – they organize/host international volunteer trips.