Ask your self why? You have to have the right intent to take on such an endevour.
Next… find a reputable guide or teacher. Check the local new age shop.
Then follow your gut.
Now, when i am learning or bonding with a new deck I take one card a day and dedicate my day to it. I read about it. I try to see how it aplies to my life. I take time to look closely at it… familiarize myself with it.
A gifted deck is always better than a bought deck.
Never accept money for a reading…