tarot card work by using ur higher self to mix the card via ur subconscious, for your subconscious know where the needed cards for a spread in mind is. the hard part is learning each tarot card because for your inner self to have any use of them you have to teach it.
anyone can learn to use them.
prettty much every "tarot" deck has the same meaning but different illustratoins. but there are oracle cards which are different.
and if you know how to corerrectly use them u can findout a very detailed answer.