So, it's been a while since I've played this game, how would I go about getting back into it?

I last played this game when set 3 just came out, but now there are Megas and Rare Candy is in the game. Are there any coloquially good decks that aren't too expensive to play (or mostly in one pack) while I re-build my hourglasses? And any good generics to go for while I figure out what I want to play?