Bought some tarot cards.. now what?

Lol. If you were called by a deck you have psychic abilities. The more you use them the better you will become. Tarot cards work based on the subconscious energy of the user. They provide the best answer for them at that moment in time. This is why you allow people to pick their own cards or where to start in the deck. Your energy is tuned in to explain the card to the person you're reading for. First, work with your deck. You must be comfortable with it. Use the book that came with it to tell what the cards mean. They mean different things if upside down. Eventually you should be able to lose the book and go with what the cards mean to you. Practice, practice, practice. Google divination for other forms, you may find others you are drawn to.