Unless you're willing to drop a large amount of money on the game, don't expect your deck to look anything like a meta deck for a long time (unless you're playing zoolock, but that's because zoolock is pretty much the epitome of budget + efficiency). Heck, I've been playing for over a year now and I'm still trying to get all the crucial Classic cards, let alone most of the crucial expansion cards.
Which is why most of my decks are basically attempts at the lulz. It doesn't matter if I'm rarely going to get the perfect setup of Sylvannas into Shadowstepped Moatlurker into next turn Brann into Unearthed Raptor copying Moatlurker into Unearthed Raptor copying the previous Raptor, the point is that if it ever happens, I'm going to have 7 Sylvanni on the field if they play a board clear. And that's hilarious if it ever happens.