Which is the right deck?

There are so many tarot decks out there and as a beginner it might be really hard to chose just one. But I would always give the advice to keep things simple. A good tarot deck must be easy to read and thus intuitive in use. So the one deck I would suggest is the classic Raider-Waite which imagery is quite easy to understand and learn. As the minor arcanas are illustrated as well they will help you to understand these as well, which can be a real pain since learning another 56 card is not that easy.