There are absolutely no rules to this. None that you should really worry about at least. Some decks are definitely easier to get into, but I’ll say (as I’m sure plenty of others will) that you should go with the deck that suits you the most.
Your best bet would be to look at these lists and see which one speaks to you.
If I were forced to suggest just one:
You get the deck (of course), a pouch and a booklet, but the cards themselves also have the basic meanings (including the reversed, which is really helpful for beginners).
