For God has not given us a spirit of timidity, but of power and love and discipline. Pray to the Lord to bind Satan and his angels . There is a hierarchy of demons seeking to hinder your witness and steal the seeds of the Gospel that you plant. You cannot fight spirits with reason or flesh and blood, but you can ask the Lord to fight. With prayer you can assault the camp of the enemy and weaken his false kingdom.
Prayer is a mighty tool, a powerful tool.
You need it if you are going to witness. Pray for your needs . If so, then pray. Enjoy your privilege of coming to the Creator of the universe who meets your every need. He loves you.