Get a book or look up online the various different meanings people give to each card. Look at a diagram of the Tree of Life and see where the cards are placed aand which Path or Sephirah they relate to.. there are differences system to system.
Get to know each card.. when I first started, long ago I made notes (I still have them!) on all the snippets of information card by card. I also took each card and slept with it for a few nights under the pillow, meditating on its symbolism as I went to sleep. I then wrote an essay on each of them, by studying the pictures in detail, describing the images, the colours, the symbols, and speculating on what they might mean. Its a good way to get to know them intimately. It also shows up things you might not have noticed.. like a flower on a certain group of cards, or a symbol that recurs.
Whatever you actually learn about them, will help guide your intuition, which, I believe, is the most useful and accurate way of reading. I heard on the radio a phrase which sums it up well.. 'knowledge is knowing that a tomato is a fruit.. wisdom is knowing you don't put tomatoes in a fruit salad.'
Find out all you can about the tarot, then listen to your heart.