Swamp Link
Yum
Yeah, I've been playing for about 2 months now, it's not a tough game to get into, the gameplay is fairly intuitive, currently I'm at rank 8 without spending any money.Cool stuff. I downloaded the game and it seems like something I'd be addicted to.. trying to unlock Heroes right now.
Definitely start by trying to unlock all of the classes against the AIs and then beating the expert AIs after them. It gets you a lot of free gold to start off with, and you'll get the hang of the game, which cards are actually good or not. The first 5 ranks of ranked play (25-20) don't penalize you for losing at all, so you can do whatever you want. I wouldn't recommend playing casual. Once you can beat all of the expert AIs, go ahead and try the arena. Don't try to play all of the classes in ranked, pick a few that you like and get a hang of them, they're all very different. Watching streamers is also a good way to get a better understanding of the game and how to get the most value out of your cards, Trump is a pretty good one. I wouldn't worry at all about net decking or the meta for a while, it really doesn't come into play for a while, even now I run kinda random decks.