The cards in itself don't give you the ability to give good Readings in Tarot, they are just a tool, which in right hands can give great result.
When you now ask how to "how to choose a deck" then you must have this in mind.
When you chose a tool for your "handy work", you don't pick one out of the box, you pick the one you think will fit best.
When it comes to Tarot, you do the same....you pick that deck that gives you a good feeling...that you feel talk to you....if none do such thing....well then maybe Tarot Reading aren't the right Trade for you, because you haven't the right imagination and connection to the Cards itself.
The more you learn about Tarot, the more you investigate other Tarot Cards, and many times you change between deck, because 1 question is best given an answer from that deck....just like other tools.
I don't hope I have put you off....I am just saying this so you don't get stuck....and it is far from religion..most Religions look down on it...but as with Religion, it needs to be believed in, and opened up for, else use it for party games
Good luck....and I recommend Gems course in Tarot in order to give you a better view
