Tarot originated from the mid-15th century and is said to have started within card games which were played in courtly circles of Northern Italy, later on used in countries throughout Europe. I think it's important to begin with the traditional cards, so that the energy and essence is not just understood and held at least once, but this also helps one to build a solid foundation.
The images on the cards within many decks, usually have ties into the Hermetic Qabalah — influenced by the Rider-Waite-Smith deck. The art of Rider-Waite, first published in 1909, is by Pamela Colman Smith, based on instructions by poet, and mystic, Arthur Edward Waite (1857–1942). Because of the influence of the Qabalah and Waite, esoteric symbolism is used within many decks in existence today.
I reccomend two decks. Firstly the Rider-Waite-Smith deck; it can seem a little simple, or basic, but like I say, it's important to establish a solid footing if you want to seriously get into using tarot long term. The second is the Mythic Tarot deck. It's close enough to the Rider-Waite-Smith deck, yet holds it's own with it's unique artwork and design.
Here is my Mythic Tarot Deck:
Currently I am using the Wild Wood Tarot:
Before that I was using Animal Divine. (Mythic was my first deck)
Over on our
Psychic Phenomena, Intuition, Mediumship & Tools board, we have the thread,
What tarot cards do you use?, which has a variety of decks people have shared. Feel free to share your deck on there if you get around to getting one!