The yes or no reading is the simplest tarot spread: one question, one card. Think of a question that can be answered with yes or no, then pick a card from the deck. An upright card leans towards yes, a reversed card leans towards no or not yet. The meaning of the card adds the reason behind the answer.
Keep the question specific. "Will I hear back about the job this week?" gives a clearer reading than "Will things work out?". If the answer is unclear, do not draw again straight away; come back to the same question another day.