I Samuel 17:38-40
So Saul clothed David with his armor, and he put a bronze helmet on his head; he also clothed him with a coat of mail. David fastened his sword to his armor and tried to walk, for he had not tested them. And David said to Saul, “I cannot walk with these, for I have not tested them.” So David took them off. Then he took his staff in his hand; and he chose for himself five smooth stones from the brook, and put them in a shepherd’s bag, in a pouch which he had, and his sling was in his hand. And he drew near to the Philistine.
If you wear armour that was not made for you, you will surely die when you come up against the giant. Use what you know best. Use whatever it is God has placed in your hands, don’t try to be somebody you are not. This week fight your battles with whatever is in your hands.