There are many ways to read playing cards--and even learning the Lenormand is one of them. Each of the 36 cards in Lenormand have a playing card number/suit that is also assigned to them. However, that is not the only way to read playing cards.
Hedgewitchery is another way for reading the cards, where all black cards are negative and all red cards are positive. You can google for the meanings of each card with this way of reading.
In fact, I would recommend googling "divining with playing cards" to see the various (and numerous!) ways there are and picking one that you think would be good and try it out. Now with the internet, there are so many sites to help you learn this and you can even find books that will help you with it as well.
Some use all the cards in the deck, where as others, like Lenormand, use only 36 cards, generally cards numbered 6 through Ace.
Many choices out there!