We all can serve God anywhere, anytime, in season, out of season, inside the walled garden of an institution, outside in the field of labor known as the world.
You say you don’t have any talents? We have all been given talents and gifts of the Spirit. Don’t hide them. Use them, and watch God multiply them.
You say you don’t have authority? As you serve and seek to understand your calling, the Holy Ghost will fill your mind and mouth with words, and you, too, will speak and teach as one having authority, and not as the scribes. You will teach out of a knowledge OF God, not just a knowledge ABOUT God.
You say you don’t have a calling, no mission? Pick the highest and most noble thing that you can do, then call yourself, and do it. The fields are whiter and more ready to harvest than they were 2,000 years ago. Don’t just pray that God will send more laborers. Send yourself. If you have desires to serve God, you are called to the work.