Class Clown
Here’s the research you should be doing. There are (at the time of writing) nine different classes of deck in Hearthstone. Each one has a unique hero ability and class-only cards that it can use. For many the best way to learn is practically so take that and apply it to Hearthstone: try out all the classes yourself.
They can be unlocked for you by defeating each one in Practice Mode. This not only provides an easy way to get your hands on each class, it also shows you how they play as the computer makes its moves to stop you. I know when you’re playing a new game the desire is often to jump in first and ask questions later but I implore you, go and unlock every class first. You’ll not only level up (and unlock new cards as a result), you could find that class which plays perfectly for you.
For example, I went into the game planning to play as a Warrior – I had for several years in World of Warcraft. After taking on the Hunter deck though I changed my mind. Amassing a menagerie of monstrous fauna suddenly became an appealing prospect along with the spells the class had. Every one of them has a particular flavor so don’t let your palette go wondering and give them a shot.